Renal & Urinary System Practice Test 2
Renal & Urinary System NCLEX Practice Test
Renal & Urinary System is a key topic within the NCLEX test plan, located under Nursing Science → Clinical Foundations → Renal & Urinary System. This section focuses on fluid regulation and nursing interventions for renal dysfunction. Each test contains 50 questions designed to mirror the difficulty and variety of the real exam.
This is the 2nd part of the Renal & Urinary System series. To explore all practice tests under this topic, use the “Back to Main Topic” button at the end of the page.
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In the Renal & Urinary System Study Cards section, shared by real NCLEX candidates, you’ll find concise summaries and high-yield insights related to the most tested concepts. It’s a perfect space to reinforce challenging topics and sharpen your recall through quick, focused repetitions. Short, powerful, and repeatable!
Renal & Urinary System Practice Test 2
Dilatation of renal pelvis of one or both kidneys due to obstruction is called?
- Hydroureter
- Hydronephrosis
- Peripheral edema
- Pyelonephritis
Explanation: Answer reason: Hydronephrosis is the dilation of the renal pelvis and calyces due to urinary outflow obstruction. Hydroureter is dilation of the ureter; pyelonephritis is a kidney infection; peripheral edema is unrelated.
The nurse notes documentation in a client's medical record that the client is experiencing anuria. The nurse plans care based on which interpretation?
- The client is unable to produce urine.
- The client has diminished capacity to form urine.
- The client has difficulty having a bowel movement.
- The client has episodes of alternating constipation and diarrhea.
Explanation: Answer reason: Anuria is the absence of urine production, typically defined as less than 100 mL in 24 hours.
The nurse explains that the autoimmune disease of acute glomerulonephritis is most usually caused by?
- Frequent cystitis.
- An upper respiratory infection.
- Childhood disease of mumps.
- A recent wound infection.
Explanation: Answer reason: Acute poststreptococcal glomerulonephritis most often follows a streptococcal pharyngeal (upper respiratory) infection, triggering an immune complex–mediated response.
Involuntary loss of urine occurring for no apparent reason while suddenly feeling the need to urinate is called?
- Functional incontinence
- Reflex incontinence
- Stress incontinence
- Urge incontinence
Explanation: Answer reason: Sudden intense urge to void with involuntary leakage is characteristic of urge incontinence, typically due to detrusor overactivity. Stress involves leakage with increased abdominal pressure; functional is due to mobility/cognitive issues; reflex relates to neurologic reflex voiding.
Which diagnostic test is most sensitive for detecting kidney stones?
- CT scan (non-contrast)
- IV pyelogram
- X-ray KUB
- Ultrasound
Explanation: Answer reason: Non-contrast helical CT is the most sensitive and specific test for nephrolithiasis, detecting both radiopaque and radiolucent stones better than IVP, KUB, or ultrasound.
Length of male urethra is Approximately is?
- 30 - 40 cm
- 18 - 20 cm
- 10 - 12 cm
- 2 - 4 cm
Explanation: Answer reason: The adult male urethra measures about 18–20 cm in length; the shorter lengths listed match the female urethra or are otherwise incorrect.
Which organ is affected in nephritis?
- Heart
- Liver
- Lungs
- Kidneys
Explanation: Answer reason: Nephritis means inflammation of the nephron/kidney tissue, so the affected organ is the kidneys.
Which characteristic is true about juxtamedullary nephrons?
- Have smaller sized glomeruli
- Possess short loops of Henle
- Have slow rate of filtration
- Both descending and ascending limbs of loop of Henle contain thin segments
Explanation: Answer reason: Juxtamedullary nephrons have long loops of Henle that extend deep into the medulla; they include a thin descending limb and a thin ascending limb (in the inner medulla). They also have larger glomeruli and higher filtration, not smaller or slower.
Which organ is removed during a nephrectomy?
- Spleen
- Kidney
- Appendix
- Uterus
Explanation: Answer reason: Nephro refers to the kidney and -ectomy means surgical removal; therefore a nephrectomy removes a kidney.
Which organ is part of the urinary system?
- Rectum
- Liver
- Adrenalin gland
- Ureter
- Kidney
Explanation: Answer reason: The kidney is a primary organ of the urinary system responsible for filtering blood and forming urine.
Structural and functional unite of kidney is called?
- Nephron
- Glomerulus
- Glomerular apparatus
- Bowman's capsule
Explanation: Answer reason: The kidney’s structural and functional unit is the nephron; the other choices are components within the nephron.
A muscular tube that extends from the kidney to the posterior surface of the bladder is?
- Epididymis
- Seminal vesicles
- Ureter
- Urinary bladder
- Uterine tubes
Explanation: Answer reason: The ureter is the muscular tube that carries urine from each kidney to the posterior aspect of the urinary bladder.
The functional unit of the kidney is the?
- Capillaries
- Alveoli
- Villi
- Nephron
Explanation: Answer reason: The nephron is the functional unit of the kidney responsible for filtration and urine formation; alveoli are in the lungs, villi are in the intestines, and capillaries are blood vessels.
The area of mucous membrane covering the internal surface of the base of the bladder is called?
- Detrusor muscle
- Trigone
- Mucosal layer
- Apex
- Base
Explanation: Answer reason: The trigone is the smooth triangular area of mucosa at the base (floor) of the bladder between the ureteric orifices and the internal urethral orifice. The detrusor is muscle, while apex and base are gross landmarks, and 'mucosal layer' is nonspecific.
A muscular tube that extends from the kidney to the posterior surface of the bladder is?
- Ureter
- Urinary bladder
- Uterine tubes
- Epididymis
- Seminal vesicles
Explanation: Answer reason: The ureter is the muscular tube that carries urine from each kidney to the posterior aspect of the urinary bladder.
A muscular tube that extends from the kidney to the posterior surface of the bladder is?
- Ureter
- Urinary bladder
- Uterine tube
- Epididymis
- Seminal vesicles
Explanation: Answer reason: The ureter is the muscular tube that carries urine from the kidney to the bladder, entering on the posterior surface. The other options are not the connecting tube between kidney and bladder.
The muscular coat of the bladder is composed of smooth muscle and is arranged as three layers of interlacing bundles known as the?
- Detrusor muscle
- Cremaster muscle
- Intercostal muscles
- Trigone
- Visceral muscles
Explanation: Answer reason: The bladder wall’s smooth muscle forms three interlacing layers collectively called the detrusor muscle. Trigone is a mucosal area, and the other options are unrelated muscles.
Which of the following problems is expected in a client who is in end-stage renal failure?
- Anemia
- Thalassemia
- Renal calculi
- Hypotension
Explanation: Answer reason: End-stage renal failure leads to decreased erythropoietin production, causing normocytic anemia. Thalassemia is a genetic disorder, renal calculi are not a typical ESRD complication, and ESRD more often causes hypertension rather than hypotension.
The muscular coat of the bladder is composed of smooth muscle and is arranged as three layers of interlacing bundles known as the?
- Detrusor muscles
- Cremaster muscles
- Intercostals muscles
- Triagone
- Visceral muscles
Explanation: Answer reason: The bladder wall’s smooth muscle forms three interlacing layers collectively called the detrusor muscle; other options refer to unrelated muscles or a bladder region (trigone).
All of the following are the complication of urinary retention Except?
- Calculi
- Heart failure
- Perineal break down
- Pyelonephritis
Explanation: Answer reason: Urinary retention leads to urinary stasis causing calculi, ascending infection such as pyelonephritis, and overflow incontinence with perineal skin breakdown. Heart failure is not a direct complication.
Which of the following is a common cause of kidney damage leading to end-stage renal disease?
- Hypertension
- Asthma
- Osteoporosis
- Migraine
Explanation: Answer reason: Hypertension chronically damages renal vasculature and glomeruli, making it a leading cause of CKD and ESRD. Asthma, osteoporosis, and migraine are not typical causes of renal failure.
What is the cause of kidney stones?
- Minerals
- Vitamins
- Proteins
Explanation: Answer reason: Kidney stones form from crystallization of minerals and salts in urine (e.g., calcium oxalate, uric acid), not from vitamins or proteins.
Which of the following is not a part of the nephron?
- Glomerulus
- Alveoli
- Bowman's capsule
- Convoluted tubules
Explanation: Answer reason: Alveoli are air sacs in the lungs, not components of the renal nephron. The glomerulus, Bowman's capsule, and convoluted tubules are parts of the nephron.
Elevated serum creatinine and BUN are indicative features of which disease?
- Diabetes mellitus
- Chronic renal failure
- Anemia
- Obstructive uropathy
Explanation: Answer reason: Elevated BUN and creatinine indicate reduced glomerular filtration and accumulation of nitrogenous wastes, classic for chronic renal failure.
What is the approximate length of the male urethra?
- 30 - 40 cm
- 18 - 20 cm
- 10 - 12 cm
- 2 - 4 cm
Explanation: Answer reason: The adult male urethra typically measures about 18–20 cm in length; females have a much shorter urethra (~3–4 cm).
What is the total amount of filtrate formed by the kidney per day?
- 100 litres
- 150 litres
- 180 litres
- 25 litres
Explanation: Answer reason: Average GFR is about 125 mL/min, totaling roughly 180 L of filtrate per day.
Kidney stones in humans mostly consist of which substance?
- Calcium
- Sodium acetate
- Calcium oxalate
- Magnesium sulphate
Explanation: Answer reason: The most common renal calculi are composed primarily of calcium oxalate, accounting for the majority of kidney stones.
Nephrosis is a disease of which organ?
- Kidney
- Nerve
- Liver
- Heart
Explanation: Answer reason: The prefix nephro- refers to the kidney; nephrosis denotes kidney disease (e.g., nephrotic syndrome).
The bladder is part of which system in the body?
- Endocrine system
- Urinary system
- Digestive system
- Respiratory system
Explanation: Answer reason: The bladder is an organ of the urinary system that stores urine before excretion.
Erythropoietin is produced primarily in the?
- Liver
- Bone marrow
- Kidney
- Spleen
Explanation: Answer reason: Erythropoietin is produced mainly by peritubular interstitial cells in the renal cortex in response to hypoxia; the liver contributes minimally (primarily fetal).
An elderly client is diagnosed with interstitial cystitis. Which finding differentiates interstitial cystitis from other forms of cystitis?
- The client is asymptomatic.
- The urine is free of bacteria.
- The urine contains blood.
- Males are affected more often.
Explanation: Answer reason: Interstitial cystitis (painful bladder syndrome) presents with urinary urgency/frequency and pelvic pain but sterile urine cultures; absence of bacteria distinguishes it from infectious cystitis.
Which organ removes waste materials from the body?
- Kidneys
- Lungs
- Heart
- Brain
Explanation: Answer reason: Kidneys filter the blood to remove metabolic wastes (e.g., urea, creatinine) and excrete them in urine, serving as the primary organ for body waste elimination.
What is the approximate length of the male urethra?
- 30-40 cm
- 18-20 cm
- 10-12 cm
- 2-4 cm
Explanation: Answer reason: The adult male urethra measures about 18–20 cm in length; shorter values match females and longer ranges are inaccurate.
What is the function of the kidneys?
- Pump Blood
- Filter waste from blood
- Produce digestive enzymes
- Store calcium
Explanation: Answer reason: Kidneys filter metabolic waste and excess fluid from the blood to form urine. The heart pumps blood, the pancreas produces most digestive enzymes, and calcium is primarily stored in bones.
What is the structural and functional unit of the kidney?
- Heart
- Liver
- Kidney
- None of these
Explanation: Answer reason: The structural and functional unit of the kidney is the nephron, which is not among the listed options; therefore, 'None of these' is correct.
Which organ regulates fluid balance?
- Heart
- Lung
- Kidney
- Brain
Explanation: Answer reason: The kidneys regulate body fluid balance by adjusting water and electrolyte excretion through filtration and reabsorption, influenced by hormones such as ADH and aldosterone.
What is the functional unit of the kidney?
- Pelvis
- Medulla
- Nephron
- Glomerulus
Explanation: Answer reason: The nephron is the kidney’s functional unit responsible for filtration, reabsorption, secretion, and urine formation.
The yellow colour of urine is due to the presence of which substance?
- Urobilin
- Bile
- Cholesterol
- Lymph
Explanation: Answer reason: Urine’s normal yellow color is due to urochrome (urobilin), a bilirubin breakdown product excreted in urine.
The primary cause of anemia in a client with chronic renal failure is?
- Poor iron absorption
- Destruction of red blood cells
- Lack of intrinsic factor
- Insufficient erythropoietin
Explanation: Answer reason: In chronic renal failure, damaged kidneys produce inadequate erythropoietin, reducing bone marrow RBC production and causing normocytic anemia. Iron absorption, RBC destruction, and intrinsic factor deficiency are not primary causes here.
Mulberry stones are a type of stones seen in which organ?
- Gallbladder
- Urinary tract
- Stomach
- All of the above
Explanation: Answer reason: Mulberry calculi are calcium oxalate stones with a nodular mulberry-like surface, classically found in the urinary tract (kidneys/ureters/bladder), not in the gallbladder or stomach.
Where is urine produced in the body?
- Liver
- Lungs
- Kidney
- Heart
Explanation: Answer reason: Urine is formed in the nephrons of the kidneys by filtration and tubular processing; it is not produced by the liver, lungs, or heart.
Which of the following complaints is common in a client with pyelonephritis?
- Right upper quadrant pain
- Left upper quadrant pain
- Pain at the costovertebral region
- Pain at the suprapubic region
Explanation: Answer reason: Pyelonephritis (kidney infection) typically presents with flank pain and costovertebral angle tenderness. Suprapubic pain is more typical of cystitis; RUQ/LUQ pain is not characteristic.
In which part of the kidney does simple filtration of urine occur?
- Glomerular capsule
- Loop of Henle
- Convoluted tubule
- Hilum
Explanation: Answer reason: Primary filtration of blood occurs across the glomerular capillaries into Bowman's (glomerular) capsule; other nephron segments mainly reabsorb or secrete solutes, and the hilum is an entry/exit site.
Following a diagnosis of acute glomerulonephritis (AGN) in their 6 year-old child, the parents remark that they are unclear as to how he caught the disease. The nurse's response is based on the understanding that?
- AGN is a streptococcal infection involving the kidney tubules
- The disease is easily transmissible in schools and camps
- The illness is usually associated with chronic respiratory infections
- It is not 'caught' but is a response to a previous B-hemolytic strep infection
Explanation: Answer reason: Acute post‑streptococcal glomerulonephritis is an immune complex–mediated reaction that follows a prior group A beta‑hemolytic streptococcal infection; it is not a contagious kidney infection.
Which of the following hormones is not secreted by the kidney?
- Renin
- Angiotensin I
- Erythropoietin
- 1,25 DHCC
Explanation: Answer reason: The kidney secretes renin and erythropoietin and activates vitamin D to 1,25-dihydroxycholecalciferol. Angiotensin I is generated in the circulation from angiotensinogen by renin and is not secreted by the kidney.
Prerenal failure occurs in which of the following conditions?
- Nephrolithiasis
- Toxic nephropathy
- Glomerulonephritis
- Heart failure
Explanation: Answer reason: Prerenal acute kidney injury results from decreased renal perfusion; reduced cardiac output in heart failure causes prerenal azotemia. The other options are intrinsic (toxic nephropathy, glomerulonephritis) or postrenal (nephrolithiasis) causes.
What term is used to describe the fluid in the renal tubules?
- Filtrate
- Solvent
- Plasma
- Urine
Explanation: Answer reason: Fluid within the renal tubules is termed tubular filtrate (glomerular filtrate). Plasma refers to blood, solvent is nonspecific, and urine is the final product after tubular processing.
What is an early adaptation symptom in a client with renal carcinoma?
- Nausea and vomiting
- Flank pain
- Weight gain
- Intermittent hematuria
Explanation: Answer reason: Painless intermittent hematuria is the most common early sign of renal cell carcinoma. Flank pain and systemic symptoms like nausea occur later; weight gain is not typical.
What is the main function of the kidney?
- Eliminate oxygen
- Regulate fluid balance and remove waste products
- Metabolize vitamins
- Eliminate carbon dioxide
Explanation: Answer reason: Kidneys maintain fluid and electrolyte balance and excrete metabolic wastes in urine; gas exchange (oxygen and carbon dioxide) is handled by the lungs and vitamin metabolism is not a primary kidney function.
What is the cause of pruritus in a patient with chronic kidney disease (CKD)?
- Hyperkalemia
- Uremia
- Hyperphosphatemia
- Hypernatremia
Explanation: Answer reason: CKD-associated pruritus is primarily due to uremia—accumulation of uremic toxins and metabolic waste products. Hyperkalemia and hypernatremia do not cause pruritus; hyperphosphatemia may contribute, but the underlying uremic state is the key cause.
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