Question 1

The Hormone which contracts the uterus muscles during childbirth to expel baby out is ......?

Accepted Answer

Answer reason: Oxytocin is released from the posterior pituitary and stimulates uterine smooth muscle contraction, which drives labor and helps expel the fetus. It also promotes postpartum uterine involution and reduces bleeding by maintaining uterine tone. Adrenaline generally inhibits uterine activity via beta-adrenergic effects, insulin regulates glucose, and “steroid” is nonspecific and not the primary labor-contracting hormone.
Category reason: This is a foundational question about a hormone’s physiologic role in labor (uterine contraction), which is primarily an endocrine physiology concept rather than a nursing-care decision.

Question 2

The hormone that is released from the testes is ____?

Accepted Answer

Answer reason: The testes (specifically Leydig cells in the interstitial tissue) produce and secrete testosterone, the primary male sex hormone. Testosterone supports male secondary sexual characteristics, spermatogenesis, and libido. Progesterone is mainly produced by the ovaries/placenta (with small amounts from adrenal/testes but not the primary testicular hormone tested). Vasopressin (ADH) is released from the posterior pituitary, not the testes.
Category reason: This question tests foundational knowledge of which endocrine hormone is produced by the testes, making it primarily an Endocrine System topic rather than a nursing care decision.

Question 3

A 17-year-old boy is brought to the office due to bilateral breast enlargement. The patient first noticed it a few months ago and says that it is slightly painful. His parents are concerned that the breast tissue is gradually becoming more prominent. The patient is in special education classes due to a long history of learning disabilities. Height is at the 95th percentile, and weight is at the 25th percentile. Examination shows symmetric glandular tissue under both nipple-areolar complexes. The lungs are clear bilaterally, and the abdomen is soft without organomegaly. The testicles appear small and firm. Neurologic examination is unremarkable. Which of the following laboratory findings is most likely to be present in this patient?

Accepted Answer

Answer reason: This presentation (tall stature, small firm testes, gynecomastia, and learning difficulties) is most consistent with Klinefelter syndrome (47,XXY) causing primary testicular failure. Primary hypogonadism leads to decreased testosterone and inhibin B, which removes negative feedback on the pituitary. As a result, gonadotropins rise, especially FSH (and also LH). The relative estrogen-to-androgen imbalance contributes to gynecomastia.
Category reason: The question tests endocrine/reproductive pathophysiology and expected hormone laboratory patterns (gonadotropins in primary hypogonadism), which is foundational biomedical knowledge within the Endocrine System.

Question 4

Pregnancy test done by presence of?

Accepted Answer

Answer reason: Most urine and serum pregnancy tests detect human chorionic gonadotropin (hCG), a hormone produced by the syncytiotrophoblast shortly after implantation. hCG rises rapidly in early pregnancy, making it a sensitive marker for confirming pregnancy. hPL and progesterone are pregnancy-related but are not the standard targets of routine pregnancy test kits, and LH is primarily used for ovulation prediction rather than pregnancy confirmation.
Category reason: The item tests knowledge of which hormone is detected to confirm pregnancy, which is foundational reproductive/endocrine physiology rather than a nursing intervention or prioritization scenario.

Question 5

The onset of puberty is triggered by increased pulsatile release of?

Accepted Answer

Answer reason: Puberty begins with reactivation of the hypothalamic-pituitary-gonadal axis, primarily driven by increased pulsatile secretion of GnRH from the hypothalamus. GnRH stimulates the anterior pituitary to release LH and FSH in a pulsatile pattern. These gonadotropins then act on the gonads to increase sex steroid production (e.g., estrogen), leading to secondary sexual characteristics. Therefore, the initiating pulsatile signal is GnRH, not LH/FSH or estrogen.
Category reason: This question tests hormonal regulation of puberty via the hypothalamic-pituitary-gonadal axis, which is a core topic in endocrine physiology rather than a nursing intervention scenario.

Question 6

The hormone primarily responsible for ovulation is?

Accepted Answer

Answer reason: Ovulation is triggered by the mid-cycle surge of luteinizing hormone (LH), which causes the dominant ovarian follicle to rupture and release the oocyte. Estrogen rises during the follicular phase and helps generate the positive feedback that produces the LH surge, but it is not the direct trigger. FSH primarily stimulates follicular growth and maturation earlier in the cycle. Progesterone mainly rises after ovulation from the corpus luteum to prepare and maintain the endometrium.
Category reason: This item tests hormonal control of the menstrual cycle and ovulation, which is a foundational endocrine physiology concept rather than a nursing care intervention.

Question 7

Which endocrine gland is found in the brain?

Accepted Answer

Answer reason: The pituitary gland (hypophysis) is located at the base of the brain in the sella turcica and is connected to the hypothalamus via the pituitary stalk. It secretes key hormones that regulate other endocrine glands (e.g., thyroid, adrenal, gonads). In contrast, the thyroid is in the neck, adrenal glands sit atop the kidneys, and the pancreas is in the abdomen.
Category reason: This question tests foundational knowledge of endocrine anatomy/location, which is primarily covered under the Endocrine System rather than nursing interventions or clinical decision-making.

Question 8

Which test gives a 3-month average of blood glucose levels?

Accepted Answer

Answer reason: HbA1c reflects the percentage of hemoglobin that has been glycated, which is proportional to average blood glucose exposure over the lifespan of red blood cells. Because erythrocytes live about 120 days, HbA1c approximates mean glycemia over the prior 2–3 months (with greater weighting to recent weeks). In contrast, fasting and random glucose measure glucose at a single point in time, and an oral glucose tolerance test assesses the body’s short-term response to a glucose load.
Category reason: The question tests understanding of diabetes-related laboratory evaluation and what each glucose test represents physiologically over time, which is core endocrine system science rather than a nursing intervention or prioritization decision.

Question 9

Q. Insulin secreted by...?

Accepted Answer

Answer reason: Insulin is produced and secreted by the beta (β) cells in the islets of Langerhans of the pancreas. Its primary role is to lower blood glucose by increasing cellular uptake of glucose and promoting glycogen synthesis in liver and muscle. The kidney and nephrons are involved in glucose handling and insulin clearance, not insulin secretion. The liver responds to insulin but does not secrete it.
Category reason: The question tests foundational knowledge of hormone source and endocrine physiology, specifically which organ secretes insulin, so it belongs to the Endocrine System within NursingScience rather than a nursing care decision.

Question 10

The Largest Endocrine gland is ........?

Accepted Answer

Answer reason: Among the listed endocrine glands, the thyroid is generally considered the largest endocrine gland in the body. It has substantial mass and is highly vascular, producing key hormones (T3 and T4) that regulate metabolism and growth. The pancreas is larger overall but is primarily an exocrine organ, with endocrine function limited to the islets of Langerhans. The pineal and adrenal glands are much smaller than the thyroid.
Category reason: This question tests foundational knowledge of endocrine gland size and classification, which falls under the Endocrine System in Nursing Science rather than nursing interventions or clinical decision-making.

Question 11

Which gland is responsible for producing melatonin?

Accepted Answer

Answer reason: Melatonin is synthesized and secreted primarily by the pineal gland, with secretion regulated by the light-dark cycle via the suprachiasmatic nucleus. Melatonin helps regulate circadian rhythms and sleep-wake timing. The pituitary produces trophic hormones (e.g., TSH, ACTH), the thyroid produces T3/T4 and calcitonin, and the adrenal glands produce cortisol, aldosterone, and catecholamines, not melatonin.
Category reason: This is a foundational question about which endocrine gland produces a specific hormone (melatonin), which falls under endocrine system physiology rather than nursing care decision-making.

Question 12

Which hormone increases metabolism?

Accepted Answer

Answer reason: Thyroxine (T4), converted to the more active T3, is the primary hormone responsible for increasing basal metabolic rate in most tissues by upregulating cellular oxygen consumption and heat production. This increases overall energy expenditure and affects carbohydrate, fat, and protein metabolism. Insulin primarily promotes glucose uptake and storage, oxytocin is involved in uterine contraction and milk ejection, and cortisol regulates stress responses and gluconeogenesis rather than being the main controller of basal metabolic rate.
Category reason: The question tests foundational hormone physiology and regulation of metabolic rate, which is core endocrine system science rather than a nursing care decision.

Question 13

Type 2 diabetes is due to?

Accepted Answer

Answer reason: Type 2 diabetes mellitus is primarily caused by insulin resistance, meaning body tissues do not respond adequately to insulin and therefore cannot effectively utilize it to promote glucose uptake. Over time, pancreatic beta cells may fail and insulin secretion can decrease, but the initiating defect is impaired insulin action rather than absolute lack of production. A complete lack of insulin production is characteristic of type 1 diabetes. High glucose intake alone does not directly cause diabetes, and glucose synthesis is not the central defect.
Category reason: This question tests the underlying mechanism of diabetes mellitus (insulin resistance vs insulin deficiency), which is a core concept in endocrine regulation and metabolic control within the Endocrine System.

Question 14

Which of the following hormone helps regulate electrolytes balance?

Accepted Answer

Answer reason: Aldosterone, a mineralocorticoid from the adrenal cortex, is the primary hormone regulating electrolyte balance by increasing sodium reabsorption and potassium (and hydrogen) excretion in the distal nephron. Water follows sodium, so it also influences extracellular fluid volume and blood pressure. Thyroxine mainly regulates metabolic rate, epinephrine mediates acute sympathetic responses, and cortisol is primarily a glucocorticoid (only weak mineralocorticoid activity at physiologic levels).
Category reason: This question tests knowledge of a specific hormone’s physiologic role in regulating sodium and potassium handling, which is a core concept of endocrine regulation.

Question 15

The half life of hCG is about?

Accepted Answer

Answer reason: Human chorionic gonadotropin (hCG) is a glycoprotein hormone whose circulating half-life is approximately 24 hours. This pharmacokinetic property explains why serum hCG levels change over days and can be trended clinically in pregnancy and trophoblastic disease. The other options are far too short (10 minutes) or too long (10 days, 24 days) for typical hCG clearance.
Category reason: The item tests knowledge of a hormone’s half-life (endocrine physiology/biochemistry of hCG) rather than nursing interventions or patient-care decisions, so it fits NursingScience under the Endocrine System.

Question 16

Milk secretion is controlled by?

Accepted Answer

Answer reason: Prolactin, secreted by the anterior pituitary, stimulates milk production (lactogenesis) in the mammary glands after delivery. Suckling triggers a neuroendocrine reflex that increases prolactin release to maintain ongoing milk synthesis. Oxytocin (not listed) is responsible for milk ejection/let-down, not milk secretion. Insulin, thyroxine, and melatonin are not the primary hormones controlling milk production.
Category reason: This is a hormonal regulation question about lactation control, which is primarily an Endocrine System concept rather than a nursing intervention or prioritization scenario.

Question 17

The pituitary gland secretes the hormone

Accepted Answer

Answer reason: The anterior pituitary gland secretes growth hormone (somatotropin), which stimulates linear growth and protein synthesis and affects metabolism. By contrast, thyroxine and calcitonin are thyroid hormones (from follicular cells and C cells, respectively). Testosterone is primarily produced by the testes (and to a lesser extent ovaries/adrenal glands), not the pituitary.
Category reason: This item tests foundational knowledge of which endocrine gland produces specific hormones, which is core Endocrine System physiology rather than nursing interventions or prioritization.

Question 18

Hyperglycemia is the manifestation of?

Accepted Answer

Answer reason: Hyperglycemia occurs in diabetes mellitus due to absolute or relative insulin deficiency leading to reduced cellular glucose uptake. In Cushing syndrome, excess cortisol increases gluconeogenesis and induces insulin resistance, raising blood glucose levels. Hyperthyroidism can also worsen glucose tolerance by increasing hepatic glucose output and increasing insulin resistance/clearance, which may manifest as hyperglycemia. Therefore, hyperglycemia can be seen in all listed conditions.
Category reason: The question tests endocrine-related causes of elevated blood glucose (insulin deficiency/resistance and hormone excess effects on metabolism), which is foundational biomedical knowledge under the Endocrine System.

Question 19

Kisspeptin is important in puberty because it?

Accepted Answer

Answer reason: Kisspeptin (via KISS1 neurons) activates GnRH neurons through the GPR54/KISS1R receptor, increasing pulsatile GnRH secretion. This rise in GnRH stimulates pituitary gonadotropin release (LH/FSH), initiating the pubertal activation of the hypothalamic-pituitary-gonadal axis. Therefore, its key role in puberty is stimulation—not inhibition—of GnRH release.
Category reason: The item tests hormonal regulation of puberty via hypothalamic GnRH control within the hypothalamic-pituitary-gonadal axis, which is core Endocrine System physiology.

Question 20

Prolactin is an example of?

Accepted Answer

Answer reason: Prolactin is a peptide hormone secreted primarily by lactotroph cells in the anterior pituitary gland. Its major physiologic role is to stimulate milk production (lactation) in the postpartum period and it also influences reproductive function via effects on gonadotropin-releasing hormone. It is not a vitamin or an enzyme; while it is a protein/peptide in structure, the best classification by function is a hormone.
Category reason: The question tests identification of prolactin as a pituitary endocrine secretion, which is core content of the Endocrine System in nursing science.

Question 21

The target organ of ACTH is –?

Accepted Answer

Answer reason: Adrenocorticotropic hormone (ACTH) is secreted by the anterior pituitary and primarily targets the adrenal cortex. It stimulates synthesis and release of glucocorticoids (especially cortisol) and supports adrenal cortical growth. The thyroid is primarily regulated by TSH, the gonads by LH/FSH, and the pancreas is regulated by glucose and incretins rather than ACTH.
Category reason: This is a foundational hormone-target relationship question focused on pituitary control of an endocrine organ, which is part of the Endocrine System.

Question 22

Which gland produces melatonin in the human body?

Accepted Answer

Answer reason: Melatonin is secreted primarily by the pineal gland, with production increasing in darkness and helping regulate circadian (sleep-wake) rhythms. The pituitary gland releases hormones such as ACTH, TSH, and growth hormone, not melatonin. The thyroid gland produces thyroid hormones (T3/T4) and calcitonin, also not melatonin.
Category reason: This is a foundational question about which endocrine gland produces a specific hormone (melatonin), which falls under the Endocrine System.

Question 23

Q.361 STRONGEST STIMULATION OF LACTATION IS BY?

Accepted Answer

Answer reason: Suckling is the strongest physiologic stimulus for lactation because nipple stimulation triggers hypothalamic pathways that increase prolactin release from the anterior pituitary, promoting milk production. It also triggers oxytocin release from the posterior pituitary, producing milk ejection (let-down) that reinforces ongoing breastfeeding. Metoclopramide can increase prolactin but is a weaker, pharmacologic stimulus compared with frequent effective suckling. Bromocriptine is a dopamine agonist that suppresses prolactin and therefore inhibits lactation; PPH is not a lactation stimulant and can impair breastfeeding if associated with hypopituitarism (Sheehan syndrome).
Category reason: The question tests hormonal/physiologic control of milk production and let-down (prolactin and oxytocin regulation), which is primarily an Endocrine System concept rather than a nursing intervention/priority scenario.

Question 24

FSH and LH are collectively known as?

Accepted Answer

Answer reason: Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) are anterior pituitary hormones that act on the gonads (ovaries and testes) to regulate gametogenesis and sex steroid production. Because their primary target organs are the gonads, they are classified together as gonadotropins (gonadotrophic hormones). They are not neurohormones (typically hypothalamic releasing hormones), nor are they primarily “antistress” or “emergency” hormones (roles associated with cortisol and catecholamines).
Category reason: The item tests classification and function of pituitary hormones (FSH and LH) within hormonal regulation of reproduction, which is core Endocrine System content rather than nursing interventions or clinical judgment.

Question 25

Which hormone is primarily responsible for maintaining pregnancy?

Accepted Answer

Answer reason: Progesterone is the key hormone that maintains the endometrium (decidua) and supports implantation and continuation of pregnancy. It decreases uterine contractility and helps maintain a stable uterine environment, reducing the risk of early pregnancy loss. Early in pregnancy it is produced mainly by the corpus luteum (supported by hCG) and later by the placenta. Estrogen, LH, and FSH play important roles in reproduction but are not the primary hormones responsible for maintaining pregnancy.
Category reason: The item tests foundational hormonal physiology of pregnancy maintenance, focusing on endocrine regulation rather than nursing actions or clinical decision-making.

Question 26

Which hormone is detected in urine during pregnancy tests?

Accepted Answer

Answer reason: Urine pregnancy tests detect human chorionic gonadotropin (hCG), a hormone produced by trophoblastic cells of the developing placenta shortly after implantation. hCG rises rapidly in early pregnancy and is present in maternal blood and urine, making it an effective marker for pregnancy detection. Estrogen and progesterone increase in pregnancy but are not the standard targets for rapid urine pregnancy tests. LH is structurally similar to hCG and can cause cross-reactivity in some assays, but modern tests are designed to be specific for hCG.
Category reason: The question tests knowledge of which reproductive/placental hormone is measured by pregnancy tests, which is foundational endocrine physiology rather than a nursing intervention or prioritization decision.

Question 27

It's function is maintain adequate serum level of calcium?

Accepted Answer

Answer reason: Vitamin D is essential for maintaining normal serum calcium by increasing intestinal absorption of calcium and phosphate. It also supports bone mineralization and, when calcium is low, helps facilitate mobilization of calcium from bone in coordination with parathyroid hormone. Deficiency leads to impaired mineralization (rickets/osteomalacia) and can contribute to hypocalcemia.
Category reason: This item tests the physiologic role of a hormone-like vitamin in calcium homeostasis, which is primarily an endocrine regulation concept rather than a nursing intervention scenario.

Question 28

Which finding is most consistent with thyroid storm?

Accepted Answer

Answer reason: Thyroid storm is an acute, life-threatening exacerbation of hyperthyroidism characterized by severe sympathetic overactivity and hypermetabolism. Classic findings include high fever (hyperthermia), marked tachycardia (often with arrhythmias), and central nervous system changes such as agitation, confusion, or delirium. The other options reflect hypothyroidism (e.g., hypothermia, bradycardia, lethargy, constipation, drowsiness) or nonspecific shock findings rather than thyroid storm.
Category reason: The question tests recognition of the hallmark clinical manifestations of an acute hyperthyroid endocrine crisis, which is primarily foundational endocrine pathophysiology rather than nursing care prioritization.

Question 29

A nurse is assessing a client with diabetic ketoacidosis (DKA). Which lab result supports this diagnosis?

Accepted Answer

Answer reason: Diabetic ketoacidosis is characterized by significant hyperglycemia along with a high anion gap metabolic acidosis. A blood glucose of 350 mg/dL supports hyperglycemia consistent with DKA, and a pH of 7.25 indicates acidemia. The other options show either near-normal glucose and pH, normal bicarbonate without acidosis, or hypoglycemia with alkalemia, which do not support DKA.
Category reason: The item tests recognition of the endocrine metabolic disorder DKA using characteristic laboratory patterns (hyperglycemia and acidosis), which is foundational biomedical knowledge within the Endocrine System.

Question 30

Which hormone is responsible for milk production?

Accepted Answer

Answer reason: Prolactin, secreted by the anterior pituitary, stimulates milk synthesis in the mammary glands after delivery. Oxytocin primarily causes milk ejection (let-down) by contracting myoepithelial cells, not production. Estrogen and progesterone support breast development during pregnancy, and high levels during pregnancy inhibit lactation until they fall postpartum.
Category reason: This tests foundational hormone physiology (pituitary hormones and lactation control), which is best categorized under the Endocrine System rather than nursing interventions or care prioritization.

Question 31

Master gland in human body is?

Accepted Answer

Answer reason: The pituitary gland is commonly called the “master gland” because its anterior lobe secretes trophic hormones (e.g., TSH, ACTH, LH/FSH) that regulate other endocrine glands such as the thyroid, adrenal cortex, and gonads. It also releases hormones that directly affect growth (GH) and lactation (prolactin). Although the hypothalamus controls the pituitary via releasing/inhibiting hormones, among the given options the pituitary is the best correct answer.
Category reason: This item tests foundational knowledge of endocrine gland hierarchy and hormonal regulation rather than nursing interventions or clinical decision-making, placing it in the Endocrine System.

Question 32

Which hormone is released by the pancreas to lower blood sugar levels?

Accepted Answer

Answer reason: Insulin is secreted by pancreatic beta cells in the islets of Langerhans and lowers blood glucose by promoting cellular glucose uptake (especially in muscle and adipose) and glycogen synthesis in the liver. It also suppresses hepatic gluconeogenesis and glycogen breakdown, further reducing circulating glucose. In contrast, glucagon raises blood glucose, and thyroxine is a thyroid hormone not produced by the pancreas.
Category reason: This tests foundational knowledge of pancreatic hormones and their effects on blood glucose regulation, which is a core topic within the Endocrine System.

Question 33

Pituitary gland is located __??

Accepted Answer

Answer reason: The pituitary gland (hypophysis) sits at the base of the brain in the sella turcica of the sphenoid bone and is connected to the hypothalamus via the pituitary stalk. It is a central endocrine organ that secretes hormones controlling other glands (e.g., thyroid, adrenal, gonads). Therefore, among the choices, the correct location is the brain.
Category reason: This item tests foundational knowledge of where a major endocrine gland is anatomically located, which is core Endocrine System content rather than nursing interventions or clinical decision-making.

Question 34

Which of the following hormone is produced by the thyroid gland?

Accepted Answer

Answer reason: The thyroid gland produces thyroxine (T4) and triiodothyronine (T3) from follicular cells, which regulate metabolic rate and growth. It also produces calcitonin from parafollicular (C) cells, which helps lower serum calcium by inhibiting osteoclast activity. Since all three listed hormones are produced by the thyroid, the best answer is "All of the above.
Category reason: This question tests foundational knowledge of hormones secreted by the thyroid gland, which is a core topic in the Endocrine System rather than a nursing care/intervention decision.

Question 35

What is the main hormonal regulator of natural vaginal lubrication?

Accepted Answer

Answer reason: Estrogen is the primary hormone supporting vaginal epithelium maturation and maintaining adequate blood flow and tissue hydration, which promotes normal lubrication. When estrogen levels fall (e.g., menopause), the vaginal mucosa becomes thinner and drier, commonly causing vaginal dryness and dyspareunia. Progesterone is more associated with secretory changes and pregnancy-related effects, testosterone contributes to libido but is not the main regulator of lubrication, and oxytocin primarily affects uterine contractions and milk letdown.
Category reason: This question tests foundational hormone physiology and its effects on reproductive tract function, which fits best under the Endocrine System rather than nursing interventions or prioritization.

Question 36

Diabetes insipidus is caused by imbalance of?

Accepted Answer

Answer reason: Diabetes insipidus results from deficiency of antidiuretic hormone (central DI) or renal resistance to ADH (nephrogenic DI), leading to inability to concentrate urine. This causes excretion of large volumes of dilute urine with compensatory polydipsia. Glucose level and insulin relate to diabetes mellitus, not diabetes insipidus, and glycogenolysis is not the primary mechanism.
Category reason: This question tests the hormonal cause of diabetes insipidus (ADH/vasopressin regulation), which is foundational endocrine physiology rather than nursing interventions or prioritization.

Question 37

The pituitary gland secretes the hormone is ...?

Accepted Answer

Answer reason: Growth hormone (GH, somatotropin) is secreted by the anterior pituitary gland and regulates growth and metabolism (including effects on protein synthesis and glucose homeostasis). Thyroxine is produced by the thyroid gland, testosterone is primarily produced by the testes (and ovaries/adrenal cortex in smaller amounts), and calcitonin is produced by thyroid parafollicular (C) cells. Therefore, among the listed options, growth hormone is the pituitary hormone.
Category reason: This question tests foundational knowledge of which endocrine gland produces specific hormones, which is primarily biomedical content within the Endocrine System rather than a nursing intervention or clinical judgment scenario.

Question 38

Insulin is __________?

Accepted Answer

Answer reason: Insulin is a peptide hormone produced by pancreatic beta cells in the islets of Langerhans. Its primary role is to lower blood glucose by promoting cellular uptake of glucose (especially in muscle and adipose tissue) and by increasing glycogen synthesis while inhibiting hepatic glucose production. It is not a macronutrient (fat or carbohydrate) and it is not a vitamin, which are micronutrients obtained from the diet rather than secreted by endocrine glands.
Category reason: This is a foundational question about the biological nature and function of insulin, a key endocrine hormone involved in glucose homeostasis, which places it under the Endocrine System.

Question 39

The _____ releases Calcitonin hormone.

Accepted Answer

Answer reason: Calcitonin is secreted by the parafollicular (C) cells of the thyroid gland. Its primary physiologic action is to lower serum calcium by inhibiting osteoclast-mediated bone resorption and promoting calcium deposition in bone. The thymus, pituitary, and adrenal glands do not produce calcitonin.
Category reason: This question tests knowledge of which endocrine gland secretes a specific hormone (calcitonin), which is a foundational concept in the Endocrine System.

Question 40

The emergency hormone is................?

Accepted Answer

Answer reason: Adrenaline (epinephrine) is classically called the “emergency hormone” because it is rapidly released from the adrenal medulla during acute stress and activates the fight-or-flight response. It increases heart rate and contractility, causes bronchodilation, and raises blood glucose to provide immediate energy. Insulin regulates glucose storage, progesterone supports pregnancy and menstrual cycle regulation, and thyroxine primarily controls basal metabolic rate rather than acute emergency responses.
Category reason: This is a foundational question about hormone function and acute stress physiology, which falls under endocrine system science rather than nursing care decisions or prioritization.

Question 41

Insulin is secreted by which cell of Pancreas?

Accepted Answer

Answer reason: Insulin is produced and secreted by pancreatic beta (β) cells located in the islets of Langerhans. Beta-cell insulin release is stimulated primarily by elevated blood glucose and promotes glucose uptake and storage in tissues. In contrast, alpha cells secrete glucagon, delta cells secrete somatostatin, and gamma (PP) cells secrete pancreatic polypeptide, so these options are incorrect.
Category reason: This is a foundational endocrine physiology question testing which pancreatic islet cell type secretes a specific hormone (insulin), which fits the Endocrine System subject rather than nursing interventions or clinical decision-making.

Question 42

What is the first-line management for hypothalamic amenorrhea?

Accepted Answer

Answer reason: Hypothalamic amenorrhea is due to decreased hypothalamic GnRH pulsatility, leading to low FSH/LH and anovulation. Physiologic replacement with pulsatile GnRH is first-line to restore normal gonadotropin release and induce ovulation. Clomiphene is less effective when endogenous gonadotropins are low, progesterone only induces withdrawal bleeding without correcting ovulation, and IVF is reserved for failure of simpler ovulation-induction methods.
Category reason: This item tests understanding of hypothalamic-pituitary-ovarian axis physiology and hormone-based treatment (pulsatile GnRH), which is primarily endocrine science rather than nursing care prioritization or safety.

Question 43

The decreased secretion of insulin causes---.

Accepted Answer

Answer reason: Insulin lowers blood glucose by promoting cellular uptake of glucose and inhibiting hepatic glucose output. Decreased insulin secretion leads to persistent hyperglycemia and impaired carbohydrate, fat, and protein metabolism, which characterizes diabetes mellitus (especially type 1 diabetes due to absolute insulin deficiency). The other options are vitamin/mineral deficiency disorders (beriberi—thiamine, rickets—vitamin D) or a hematologic condition (anemia) and are not directly caused by low insulin.
Category reason: This question tests the physiologic consequence of reduced insulin secretion, a hormone produced by pancreatic beta cells, which is a core concept of endocrine regulation and diabetes pathophysiology.

Question 44

A nurse is caring for a client in Addisonian crisis. Which finding supports this diagnosis?

Accepted Answer

Answer reason: Addisonian crisis is acute adrenal insufficiency with critically low cortisol and aldosterone. Loss of aldosterone causes sodium and water wasting, leading to hypovolemia, dehydration, and sudden hypotension (often progressing to shock). The other options are less characteristic: hypertension conflicts with adrenal crisis, and diarrhea may occur but does not best capture the hallmark life-threatening presentation compared with hypotension/dehydration.
Category reason: The question tests recognition of clinical manifestations of acute adrenal (cortisol/aldosterone) deficiency, which is core endocrine pathophysiology rather than a nursing management/prioritization task.

Question 45

A nurse notes exophthalmos in a client with Graves' disease. What causes this symptom?

Accepted Answer

Answer reason: In Graves' disease, exophthalmos results from autoimmune-mediated inflammation of the orbital fibroblasts and extraocular muscles, leading to edema and glycosaminoglycan deposition within the orbit. This increases retro-orbital tissue volume and pushes the eyeball forward. It is not primarily due to fluid retention alone, elevated intraocular pressure, or pituitary mass effect.
Category reason: The question tests the pathophysiologic mechanism of a hallmark sign of Graves’ hyperthyroidism (thyroid eye disease), which is a core topic of the Endocrine System rather than a nursing intervention or prioritization scenario.

Question 46

A client with Cushing's syndrome is at greatest risk for?

Accepted Answer

Answer reason: Cushing's syndrome involves excess cortisol, which suppresses immune function (increasing infection risk) and promotes insulin resistance and gluconeogenesis (causing hyperglycemia). Typical features also include hypertension, fluid retention, weight gain, and muscle wasting rather than hypotension or dehydration. Hypoglycemia and bradycardia are not characteristic risks of hypercortisolism, making infection and hyperglycemia the best answer.
Category reason: This question tests the physiologic effects and complications of hypercortisolism, which is core endocrine system science rather than a nursing-priority/intervention scenario.

Question 47

A goiter is an inflammation or swelling of which gland?

Accepted Answer

Answer reason: A goiter refers to an enlargement (swelling) of the thyroid gland, typically presenting as an anterior neck mass. It can occur with iodine deficiency, autoimmune thyroid disease (e.g., Graves or Hashimoto), or thyroid nodules, and may be associated with hypo-, hyper-, or euthyroid states. The prostate, thymus, and pituitary do not produce a neck swelling termed “goiter.”.
Category reason: This question tests identification of the gland involved in goiter, which is a core concept in endocrine system structure and disease.

Question 48

Results from the pancreas failure to produce enough insulin?

Accepted Answer

Answer reason: Type 1 diabetes mellitus results from autoimmune destruction of pancreatic beta cells, leading to an absolute insulin deficiency (failure to produce sufficient insulin). Type 2 diabetes is primarily driven by insulin resistance with a relative insulin deficiency that often develops later. Gestational diabetes is glucose intolerance first recognized during pregnancy and is largely related to pregnancy-induced insulin resistance rather than primary pancreatic failure. Therefore, the best answer is Type 1 DM.
Category reason: The question tests foundational understanding of diabetes pathophysiology and insulin production by the pancreas, which is an endocrine regulation concept rather than a nursing intervention or prioritization scenario.

Question 49

Male sex hormone is?

Accepted Answer

Answer reason: Testosterone is the primary male sex hormone (androgen) produced mainly by Leydig cells in the testes. It drives development of male secondary sexual characteristics and supports spermatogenesis and libido. Estrogen and progesterone are primarily female reproductive hormones (though present in smaller amounts in males), while melatonin regulates circadian rhythm rather than sexual development.
Category reason: This item tests knowledge of hormone identity and function in human reproduction, which is a core topic within endocrine system physiology.

Question 50

Which hormone helps prepare the uterine lining for pregnancy?

Accepted Answer

Answer reason: Progesterone is the primary hormone that converts the estrogen-primed endometrium into a secretory lining, making it receptive to implantation and supporting early pregnancy. It stabilizes the uterine lining and reduces uterine contractility. Estrogen mainly promotes proliferative growth of the endometrium, while LH primarily triggers ovulation and corpus luteum formation rather than directly preparing the lining.
Category reason: The question tests knowledge of reproductive hormone function (progesterone’s role in endometrial preparation), which is a core concept in the Endocrine System within NursingScience rather than a nursing intervention scenario.

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