Question 1

Site of growth in the length of a long bone is?

Accepted Answer

Answer reason: Epiphyseal plate Longitudinal growth of long bones occurs at the epiphyseal (growth) plate where cartilage proliferates and is replaced by bone through endochondral ossification. This process continues until skeletal maturity, when the growth plate closes and becomes the epiphyseal line. The periosteum is mainly responsible for appositional (width) growth, while diaphysis and bone marrow are not the primary sites for length increase.
Category reason: This is a foundational structural question about where long bones increase in length, which is an anatomy concept rather than a nursing care/intervention decision.

Question 2

DNA is found in?

Accepted Answer

Answer reason: Nucleus In eukaryotic cells, the primary location of DNA is the nucleus, where it is organized into chromosomes and regulates gene expression. Ribosomes contain rRNA and proteins but do not store genomic DNA. The Golgi body is involved in processing and packaging proteins/lipids, and cytoplasm contains many organelles but not the main genomic DNA store (aside from organelle DNA like mitochondria, which is not an option here).
Category reason: This question tests basic cell structure and where genetic material is located, which is a foundational anatomy/cell biology concept rather than a nursing care decision.

Question 3

Finger bones are called?

Accepted Answer

Answer reason: Phalanges Finger bones are anatomically termed phalanges (proximal, middle, and distal; the thumb has only proximal and distal). Carpals are the wrist bones, and metacarpals form the palm. Tarsals are ankle/foot bones, not part of the hand.
Category reason: This question tests naming of skeletal structures of the hand, which is a foundational anatomy topic rather than a nursing intervention or clinical judgment task.

Question 4

Which of the following is known as bone forming cells?

Accepted Answer

Answer reason: Osteoblasts Osteoblasts are the bone-forming cells responsible for synthesizing osteoid (bone matrix) and promoting mineralization. Osteoclasts are bone-resorbing cells, not forming cells. Osteocytes are mature bone cells that maintain bone tissue after osteoblasts become embedded in the matrix. “Fibrinoblast” is not a standard term for bone-forming cells (fibroblasts form connective tissue).
Category reason: This question tests foundational knowledge of bone cell types and their functions, which is a core anatomy topic rather than a nursing care decision.

Question 5

How many degrees of freedom does the wrist joint have?

Accepted Answer

Answer reason: Two The wrist (radiocarpal) joint is functionally condyloid/ellipsoid, allowing motion in two primary planes: flexion–extension and radial–ulnar deviation (abduction–adduction). These represent two degrees of freedom. Pronation–supination occurs at the radioulnar joints rather than the wrist joint itself, so it is not counted as an additional DOF for the wrist.
Category reason: This question tests structural and functional characteristics of a joint (degrees of freedom), which is a core Anatomy concept rather than a nursing care/intervention decision.

Question 6

Weight of the bladder when full is?

Accepted Answer

Answer reason: 300 g A distended (full) adult urinary bladder typically holds about 400–600 mL of urine, which corresponds to roughly the same mass in grams (urine density ~1 g/mL). Therefore, values like 1.0 kg or 1.5 kg would imply unrealistically large volumes for a normal bladder. Among the provided choices, 300 g is the closest reasonable approximation to the expected weight when full.
Category reason: This question tests a factual normal value about the urinary bladder (structure/size and typical capacity-related mass), which is an Anatomy-focused foundational science concept rather than a nursing intervention or clinical decision-making scenario.

Question 7

The study of the structure of body parts is?

Accepted Answer

Answer reason: Anatomy Anatomy is the scientific study of body structures and the relationships among them (e.g., organs, tissues, and body parts). Physiology instead focuses on how those structures function. Biology is broader and includes many life sciences beyond human structure. Morphology refers to the form/shape of organisms but, in basic A&P context, the standard term for studying body structure is anatomy.
Category reason: This question tests foundational knowledge about the definition of anatomy versus related life sciences, which belongs to the Anatomy subject area.

Question 8

Q# (26) The biggest smooth muscle in the human body is the?

Accepted Answer

Answer reason: Myometrium muscle The myometrium is the thick smooth muscle layer of the uterus and undergoes marked hypertrophy during pregnancy, making it the largest mass of smooth muscle in the body. It is responsible for powerful uterine contractions during labor and also contributes to uterine tone postpartum. Bronchial and gastric smooth muscles are important functionally but are not the largest smooth muscle mass.
Category reason: This item tests knowledge of the largest smooth muscle layer/organ in the body, which is a structural identification question within human anatomy rather than a nursing care decision.

Question 9

The lipid bilayer of the plasma membrane is primarily composed of?

Accepted Answer

Answer reason: Phospholipids The plasma membrane’s bilayer is formed mainly by phospholipids, which have hydrophilic heads and hydrophobic tails that spontaneously arrange into a bilayer in aqueous environments. This structure creates a selectively permeable barrier and provides membrane fluidity. Proteins and cholesterol (a steroid) are important components but are not the primary building blocks of the bilayer itself.
Category reason: This is a foundational question about the structural composition of the cell (plasma) membrane, which is typically taught in basic cell anatomy/structure rather than nursing intervention or clinical judgment.

Question 10

The right lung has how many lobes?

Accepted Answer

Answer reason: B) 3 The right lung is divided into three lobes: superior, middle, and inferior. This contrasts with the left lung, which has two lobes due to space occupied by the heart (cardiac notch). Knowing lobar anatomy is important for understanding lung auscultation fields, aspiration patterns, and localization of pneumonia or atelectasis.
Category reason: This question tests basic structural anatomy of the respiratory system (lung lobes) rather than nursing interventions or clinical decision-making.

Question 11

Q. Middle meningeal artery is a branch of...?

Accepted Answer

Answer reason: Maxillary artery The middle meningeal artery typically arises from the first (mandibular) part of the maxillary artery, a terminal branch of the external carotid artery. It enters the cranial cavity via the foramen spinosum to supply the dura mater. This relationship is clinically important because trauma can lacerate the middle meningeal artery and cause an epidural hematoma.
Category reason: This question tests the anatomical origin of a named artery in the head/neck circulation, which is a foundational Anatomy fact rather than a nursing intervention or clinical management decision.

Question 12

Where is the appendix located?

Accepted Answer

Answer reason: Right lower abdomen The appendix arises from the cecum near the ileocecal valve and is classically located in the right lower quadrant of the abdomen (near McBurney’s point). This is the typical anatomic location relevant to appendicitis pain and tenderness. While the appendix can vary in position (e.g., retrocecal), it remains in the right lower abdomen region.
Category reason: This question tests the anatomical location of an organ (the appendix) rather than a nursing intervention or clinical decision, so it belongs to Anatomy.

Question 13

Which muscle is responsible for smiling?

Accepted Answer

Answer reason: Zygomaticus major The zygomaticus major elevates and draws the angle of the mouth superolaterally, producing the characteristic expression of smiling. In contrast, the masseter primarily elevates the mandible for chewing, the orbicularis oris closes and protrudes the lips, and the frontalis elevates the eyebrows and wrinkles the forehead. Therefore, the key muscle responsible for smiling is the zygomaticus major.
Category reason: This is a foundational question about the function of specific facial muscles, which is studied under Anatomy rather than nursing clinical decision-making.

Question 14

The largest part of the human brain is?

Accepted Answer

Answer reason: Cerebrum The cerebrum is the largest part of the human brain and makes up the majority of total brain mass. It contains the cerebral cortex and deeper structures responsible for higher functions such as cognition, memory, sensory perception, and voluntary motor control. The cerebellum and brainstem structures (pons, medulla oblongata) are smaller and primarily coordinate balance and vital autonomic functions.
Category reason: This question tests identification of major brain structures by size, which is a foundational structural concept in Anatomy rather than a nursing intervention or clinical judgment task.

Question 15

The longest cell in the human body is?

Accepted Answer

Answer reason: Nerve cell Neurons (nerve cells) can have very long axons, extending from the spinal cord to the toes, making them the longest cells in the human body. Bone cells (osteocytes), blood cells, and typical muscle cells do not reach comparable single-cell lengths. Although some muscle fibers are long, the classic teaching for the “longest cell” is the neuron due to its axon length.
Category reason: This question tests a basic structural fact about human cells and tissues (which cell type is longest), which is a foundational Anatomy concept rather than a nursing care decision.

Question 16

Villi are found in?

Accepted Answer

Answer reason: Intestine Villi are finger-like projections of the mucosa that markedly increase the surface area for absorption, a key feature of the small intestine. The stomach has gastric pits and glands rather than villi, and the pancreas is an accessory gland without villi. Therefore, the correct location for villi is the intestine (specifically the small intestine).
Category reason: This question tests knowledge of where an anatomical structure (villi) is located within the gastrointestinal tract, which is primarily an Anatomy concept.

Question 17

What is the thickest muscle in the body?

Accepted Answer

Answer reason: Gluteus maximus The gluteus maximus is commonly cited as the thickest muscle by cross-sectional thickness and is a major extensor of the hip. While the quadriceps group is very large and powerful, it is a group of muscles rather than a single muscle and is not typically described as the thickest single muscle. The heart is a muscular organ with thick myocardium, but it is not generally referred to as the “thickest muscle in the body” in standard anatomy quiz contexts.
Category reason: This is a foundational identification question about human musculature, which is studied in Anatomy rather than nursing care decision-making.

Question 18

How many bones are typically found in the adult human skeleton?

Accepted Answer

Answer reason: b) 206 The typical adult human skeleton contains 206 bones. While newborns have more bones, many fuse during growth (e.g., skull bones, sacrum, coccyx) to reach the adult count. Minor normal anatomic variations (e.g., accessory sesamoid bones) can occur, but 206 is the standard reference value.
Category reason: This question tests a standard fact about the number of bones in the adult skeleton, which is foundational human anatomy rather than a nursing care decision.

Question 19

The sciatic nerve is a branch of which plexus?

Accepted Answer

Answer reason: Lumbosacral plexus The sciatic nerve arises from the sacral plexus, formed by the anterior rami of L4–S3 nerve roots, which is part of the lumbosacral plexus. It is the largest nerve in the body and provides major motor and sensory innervation to the posterior thigh and most of the leg and foot via its tibial and common fibular branches. The cervical plexus supplies neck/diaphragm-related nerves, and the brachial plexus supplies the upper limb, so they cannot be the source of the sciatic nerve.
Category reason: This is a foundational question about the anatomical origin of a peripheral nerve from a nerve plexus, which is primarily tested under Anatomy rather than nursing clinical decision-making.

Question 20

Branch of internal iliac artery...

Accepted Answer

Answer reason: Superior vesicle The superior vesical artery is typically a branch of the anterior division of the internal iliac artery and supplies the superior aspect of the urinary bladder (often also giving a patent part of the umbilical artery). In contrast, the ovarian and testicular (gonadal) arteries arise directly from the abdominal aorta, not the internal iliac artery. Therefore, among the listed options, the internal iliac branch is the superior vesical artery.
Category reason: This item tests knowledge of pelvic arterial anatomy and the origin of specific arteries, which is a foundational Anatomy topic rather than a nursing judgment or intervention question.

Question 21

Brain or liver - which is heavier?

Accepted Answer

Answer reason: Liver In adults, the liver is typically the heaviest internal organ, averaging about 1.4–1.6 kg, whereas the brain averages about 1.2–1.4 kg. Although both vary by sex, body size, and physiologic state, the liver generally outweighs the brain. Therefore, the liver is the heavier organ in most adults.
Category reason: This asks about comparative organ weights, which is foundational structural knowledge about body organs and is best categorized under Anatomy.

Question 22

What is the largest organ in the human body ___??

Accepted Answer

Answer reason: C_ skin The skin is the largest organ of the human body by surface area and overall mass. It functions as a protective barrier, helps regulate temperature, and provides sensory input. While the liver is the largest internal organ, the question asks for the largest organ overall, which is the skin.
Category reason: This question tests factual knowledge about human body organs and their relative size, which is a foundational Anatomy concept rather than a nursing judgment or intervention.

Question 23

Largest bone in Human body is?

Accepted Answer

Answer reason: Femur The femur (thigh bone) is the longest and strongest bone in the human body, bearing much of the body’s weight during standing and ambulation. The tibia is also a large weight-bearing bone but is smaller than the femur. The pelvis is a bony ring rather than a single long bone, and “Alna” (likely meant ulna) is a forearm bone and not the largest.
Category reason: This is a foundational question about identifying the largest human bone, which is a core concept in Anatomy rather than a nursing care decision.

Question 24

What type of joint is the elbow joint?

Accepted Answer

Answer reason: Hinge joint The elbow (primarily the humeroulnar and humeroradial articulations) is a synovial hinge joint that permits mainly flexion and extension. This uniaxial movement pattern is characteristic of hinge joints, like the knee (modified hinge) and interphalangeal joints. Pivot joints instead allow rotation (e.g., atlantoaxial, proximal radioulnar), and ball-and-socket joints allow multiaxial movement (e.g., shoulder, hip).
Category reason: This question tests identification of a joint type based on skeletal anatomy, which is foundational anatomical knowledge rather than a nursing care decision.

Question 25

Where is Pharynx located?

Accepted Answer

Answer reason: Neck The pharynx is a muscular tube located in the neck (and extends to the base of the skull), positioned posterior to the nasal and oral cavities. It serves as a shared passageway for both air (to the larynx) and food/liquids (to the esophagus). Therefore, among the options provided, the neck is the correct location.
Category reason: This is a body-structure location question about the upper airway/digestive tract, which is core Anatomy content rather than a nursing intervention or patient-care decision.

Question 26

How many bones are present in a skull?

Accepted Answer

Answer reason: 22 The adult human skull is classically described as having 22 bones. This includes 8 cranial bones (neurocranium) and 14 facial bones (viscerocranium). Although some skull-associated bones like the mandible and hyoid can be discussed in related contexts, the standard anatomical count for the skull proper is 22.
Category reason: This question tests factual knowledge of the number of bones in the human skull, which is an Anatomy concept rather than a nursing care or clinical judgment scenario.

Question 27

Which of the following is false about portal vein?

Accepted Answer

Answer reason: Gastroduodenal artery lies to the left and anterior to it The portal vein is formed behind the neck of the pancreas by the union of the splenic and superior mesenteric veins and then ascends posterior to the first part of the duodenum. In the hepatoduodenal ligament, the bile duct is typically anterior and to the right of the portal vein. The gastroduodenal artery is classically related more to the anterior aspect of the first part of the duodenum and is not described as lying to the left and anterior to the portal vein as a defining relation, making this statement false.
Category reason: This is testing anatomical relations and formation of the portal vein and nearby structures (pancreas, duodenum, bile duct, arteries), which is a core Anatomy topic rather than nursing decision-making.

Question 28

Which structure connects the throat to the stomach?

Accepted Answer

Answer reason: Esophagus The esophagus is the muscular tube that carries swallowed food and liquids from the pharynx (throat) to the stomach via peristalsis. The trachea and larynx are parts of the airway/voice box and do not connect to the stomach. The pharynx is a shared passageway for air and food but it connects to the esophagus rather than directly to the stomach.
Category reason: This is a question about identifying the anatomical structure that forms the food passage from the throat to the stomach, which is core Anatomy.

Question 29

How many pairs of ribs does the average human have?

Accepted Answer

Answer reason: A) 12 pairs The typical human rib cage consists of 12 pairs (24 ribs total). Of these, the first 7 pairs are true ribs attaching directly to the sternum, pairs 8–10 attach indirectly, and pairs 11–12 are floating ribs. The question asks for the average human count, which is classically 12 pairs.
Category reason: This tests a basic fact about the number of ribs in the human skeleton, which is a core Anatomy topic rather than nursing judgment or patient-care decision-making.

Question 30

Which structure is not passing through the inguinal canal in females?

Accepted Answer

Answer reason: Cremasteric artery In females, the inguinal canal transmits the round ligament of the uterus along with the ilioinguinal nerve, and lymphatics accompanying the round ligament can provide a pathway from the uterus to superficial inguinal nodes. The cremaster muscle and its vessels (including the cremasteric artery) are features of the spermatic cord, a male structure. Therefore, the cremasteric artery is not considered a structure passing through the inguinal canal in females.
Category reason: This is a question about anatomical contents of the female inguinal canal, which is a structural (gross anatomy) topic rather than a nursing-care decision.

Question 31

The bone that protects the brain is the?

Accepted Answer

Answer reason: Skull The skull (cranium) encloses the brain and provides the primary bony protection against trauma. The mandible protects and supports the lower jaw/teeth, vertebrae protect the spinal cord, and the rib cage protects thoracic organs like the heart and lungs. Therefore, the structure that protects the brain is the skull.
Category reason: This question tests identification of a body structure and its protective function, which is foundational human Anatomy rather than nursing interventions or clinical judgment.

Question 32

Which organ protects the brain and provides a rigid structure for the head?

Accepted Answer

Answer reason: Skull The skull (cranium) encloses and protects the brain and forms the rigid bony framework of the head. It shields the brain from mechanical injury and provides attachment points for facial bones and muscles. The spine protects the spinal cord, ribs protect the thoracic organs, and the pelvis protects pelvic organs—not the brain.
Category reason: This is a foundational question about body structures and their functions, specifically the skeletal anatomy of the head.

Question 33

Largest internal organs is ..?

Accepted Answer

Answer reason: Liver The liver is the largest internal organ in the human body by mass (the skin is the largest organ overall, but it is external). The stomach and heart are smaller organs, and while the intestines are long, they are not typically classified as the largest internal organ by weight. Therefore, the liver best fits the question as written.
Category reason: This is a foundational question about the size of human organs, which is a core Anatomy concept rather than a nursing care decision.

Question 34

The number of pairs of ribs in human body is?

Accepted Answer

Answer reason: 12 Humans typically have 12 pairs of ribs (24 total). The first 7 pairs are true ribs attaching directly to the sternum, ribs 8–10 are false ribs attaching indirectly, and ribs 11–12 are floating ribs with no anterior attachment. This is standard human thoracic skeletal anatomy.
Category reason: This question tests a basic fact about the human skeletal system (rib count), which is an Anatomy topic rather than a nursing care/judgment scenario.

Question 35

What connects muscles to bones?

Accepted Answer

Answer reason: Tendons Tendons are strong bands of dense connective tissue that attach skeletal muscle to bone, transmitting the force of muscle contraction to move joints. Ligaments connect bone to bone and primarily stabilize joints. Cartilage covers and cushions the ends of bones in joints and does not serve as the main connector between muscle and bone.
Category reason: This is a basic structural question about connective tissues (tendons vs ligaments vs cartilage), which is primarily studied in Anatomy.

Question 36

Malleus, Incus and stapis is the bone of which organ..?

Accepted Answer

Answer reason: Ear The malleus, incus, and stapes are the three auditory ossicles located in the middle ear. They transmit and amplify sound vibrations from the tympanic membrane to the oval window of the inner ear. These are not bones of the arm or skull in general, but specifically part of the ear’s conductive hearing apparatus.
Category reason: This question tests identification of specific anatomical structures (the auditory ossicles) and the organ they belong to, which is a foundational Anatomy topic.

Question 37

The main artery of the arm is?

Accepted Answer

Answer reason: Brachial artery The brachial artery is the primary continuation of the axillary artery in the upper arm and is considered the main arterial supply of the arm (brachium). It runs along the medial aspect of the arm and typically bifurcates in the cubital fossa into the radial and ulnar arteries. The subclavian is proximal (shoulder/upper thorax region), while radial and ulnar mainly supply the forearm and hand.
Category reason: This question tests identification of the principal artery supplying the arm, which is an anatomical structure-location relationship rather than a nursing intervention or clinical decision.

Question 38

The diaphragm separates which two cavities?

Accepted Answer

Answer reason: Thoracic and abdominal The diaphragm is a dome-shaped skeletal muscle forming the floor of the thoracic cavity and the roof of the abdominal cavity. It physically separates the heart/lungs above from the liver, stomach, and intestines below. It also plays a key role in respiration by changing thoracic volume.
Category reason: This question tests the anatomical relationship of major body cavities and the structure that separates them, which belongs to Anatomy.

Question 39

Who generally has a heavier brain?

Accepted Answer

Answer reason: Men On average, adult men have a higher absolute brain weight than adult women, largely reflecting overall differences in average body size rather than cognitive ability. Children have smaller brains that are still developing, and brain weight tends to decrease somewhat in older age due to age-related atrophy. Therefore, among the listed groups, men generally have a heavier brain.
Category reason: This question tests a general fact about human organ weight differences across populations, which is a structural/anatomical characteristic rather than a nursing care decision.

Question 40

How many bones are present in the human skull?

Accepted Answer

Answer reason: 22 The adult human skull is classically counted as 22 bones: 8 cranial (neurocranium) and 14 facial bones (viscerocranium). This standard anatomical count excludes the auditory ossicles and the hyoid bone. It also typically excludes sutural (wormian) bones, which are variable.
Category reason: This is a factual question about the number of bones in the skull, which is a core topic in Anatomy rather than clinical nursing decision-making.

Question 41

How much does a newborn's brain weigh?

Accepted Answer

Answer reason: 400 g A term newborn’s brain typically weighs about 350–400 g, which is roughly 10–12% of total body weight at birth. Among the given choices, 400 g best matches this standard anatomical value. The other options are either too low (200 g) or closer to older infants/children or unrealistic for a neonate (600 g, 900 g).
Category reason: This asks for a normal organ weight in a newborn, which is a foundational structural/anatomical fact rather than a nursing intervention or clinical decision, so it fits Anatomy under NursingScience.

Question 42

Which three bones form the elbow joint?

Accepted Answer

Answer reason: Humerus, radius, ulna The elbow joint complex is formed by articulations between the distal humerus and the proximal ends of the ulna and radius (humeroulnar and humeroradial joints), with the proximal radioulnar joint contributing to forearm rotation. The scapula and clavicle are part of the shoulder girdle, not the elbow. Therefore the three bones forming the elbow region’s articulations are the humerus, radius, and ulna.
Category reason: This is a foundational question about which bones anatomically constitute the elbow joint, which falls under Anatomy rather than nursing care decision-making.

Question 43

Power house of the cell is?

Accepted Answer

Answer reason: Mitochondrion Mitochondria are called the “powerhouse” because they generate most of the cell’s ATP through aerobic cellular respiration (Krebs cycle and oxidative phosphorylation). Ribosomes primarily synthesize proteins, the nucleus stores genetic material and regulates gene expression, and lysosomes are involved in intracellular digestion. Therefore, mitochondrion is the best answer.
Category reason: This is a foundational cell biology question about an organelle’s function (ATP/energy production), which fits basic structural biology taught under Anatomy in nursing sciences.

Question 44

Which nerve is responsible for sensation in the palm and fingers?

Accepted Answer

Answer reason: Median nerve The median nerve provides sensation to most of the palmar surface of the lateral hand (thumb, index, middle, and lateral half of the ring finger) via its palmar digital branches. The ulnar nerve supplies the medial palm and the little finger plus the medial half of the ring finger, and the radial nerve mainly supplies the dorsolateral hand rather than the palm. The phrenic nerve innervates the diaphragm and is unrelated to hand sensation.
Category reason: This question tests knowledge of peripheral nerve sensory distribution in the upper limb, which is a foundational Anatomy topic rather than a nursing management/intervention scenario.

Question 45

True or False The anterior fontanel usually closes by 12 to 18 months.

Accepted Answer

Answer reason: True The anterior fontanel (bregma) typically closes around 12–18 months of age, with normal variation in timing among infants. Closure is part of normal skull bone ossification and cranial suture development. Earlier or delayed closure can be associated with conditions like craniosynostosis or hypothyroidism, but the stated range is the standard expected timeframe.
Category reason: This item tests knowledge of normal infant skull structure and developmental closure timing of the anterior fontanel, which is an anatomy-focused foundational concept rather than a nursing intervention or prioritization scenario.

Question 46

The space between the lungs containing heart, trachea, and esophagus is called?

Accepted Answer

Answer reason: Mediastinum The mediastinum is the central compartment of the thoracic cavity between the lungs that contains the heart (within the pericardium), great vessels, trachea, and esophagus. The pleura refers to the serous membranes surrounding the lungs, not the central space between them. The pericardium is only the sac around the heart, and the thoracic cavity includes both pleural cavities plus the mediastinum, making it too broad to be the “space between the lungs.”.
Category reason: This asks for the anatomical name of a thoracic compartment (location and contained structures), which is a foundational Anatomy concept rather than a nursing intervention or clinical judgment.

Question 47

Question: The lobe that is located near the ear and is in charge of hearing is the ______ lobe.?

Accepted Answer

Answer reason: Temporal The temporal lobe lies on the lateral aspect of the cerebral hemispheres near the ears. It contains the primary auditory cortex (Heschl’s gyrus), which is essential for processing sound and hearing. In contrast, the occipital lobe is primarily vision, the parietal lobe is somatosensory/spatial processing, and the frontal lobe is motor/executive functions.
Category reason: This is a question about the anatomical localization and function of cerebral lobes (auditory cortex in the temporal lobe), which is core brain anatomy rather than nursing interventions or clinical prioritization.

Question 48

Which muscle is nicknamed the “kissing muscle”?

Accepted Answer

Answer reason: Orbicularis oris Orbicularis oris encircles the mouth and is responsible for closing and protruding the lips, producing the puckering action used in kissing. Orbicularis oculi acts on the eyelids, zygomaticus major elevates the corners of the mouth for smiling, and the masseter is a primary muscle of mastication for jaw elevation. Therefore, the muscle commonly nicknamed the “kissing muscle” is orbicularis oris.
Category reason: This question tests identification and function of a named facial muscle, which is core human gross anatomy rather than nursing clinical decision-making.

Question 49

What is the average weight of the human liver in adults?

Accepted Answer

Answer reason: 1.5 kg The adult human liver typically weighs about 1.4–1.6 kg, so 1.5 kg is the best average value. 500 g is far below normal adult liver mass, while 2.5 kg is above typical average and would suggest marked hepatomegaly in many adults. 1.2 kg can occur in smaller adults but is lower than the commonly cited average.
Category reason: This question asks for a normal organ weight (a basic structural fact about the liver), which is primarily an Anatomy topic rather than a nursing intervention or clinical decision-making scenario.

Question 50

Which part of the pelvic bone is the largest and forms the upper portion?

Accepted Answer

Answer reason: Ilium The ilium is the largest of the three fused bones of the hip (ilium, ischium, pubis) and forms the broad, superior portion of the pelvic bone (including the iliac crest). The ischium primarily forms the posteroinferior part ("sit bones"), and the pubis forms the anteroinferior part. The sacrum is part of the axial skeleton, articulating with the hip bones, but it is not a part of the pelvic bone itself.
Category reason: This question tests identification of pelvic/hip bone components and their anatomical positions, which is core gross Anatomy knowledge rather than a nursing intervention or safety decision.

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