Question 1

Which of the following is NOT a function of the urinary system?

Accepted Answer

Regulation of blood glucose levels

Question 2

A patient presents with high levels of potassium in their blood. Which homeostatic function of the urinary system is most directly responsible for correcting this imbalance?

Accepted Answer

Regulating plasma ion concentrations

Question 3

Which structure is responsible for producing urine in the kidney?

Accepted Answer

Kidney lobe

Question 4

The glomerular filtration membrane is composed of all the following EXCEPT:

Accepted Answer

Smooth muscle cells

Question 5

Which of the following best describes the path of blood flow into and out of the glomerulus?

Accepted Answer

Afferent arteriole → glomerulus → efferent arteriole

Question 6

A patient is unable to concentrate urine and is losing excessive water. Which nephron type is most likely malfunctioning?

Accepted Answer

Juxtamedullary nephron

Question 7

Which of the following equations best represents the process of glomerular filtration?

Accepted Answer

$$GFR = K_f (P_{GC} - P_{BS} - \pi_{GC})$$

Question 8

Which of the following statements about the ureters is TRUE?

Accepted Answer

They penetrate the posterior wall of the urinary bladder at an oblique angle to prevent backflow.

Question 9

A patient with a blocked ureter would most likely experience which of the following symptoms?

Accepted Answer

Swelling of the kidney due to urine backup (hydronephrosis)

Question 10

Which of the following best explains why the female urethra is more susceptible to urinary tract infections (UTIs) than the male urethra?

Accepted Answer

The female urethra is shorter, providing a shorter path for bacteria to reach the bladder.

Question 11

Which of the following is a correct sequence of urine flow from the nephron to the exterior of the body?

Accepted Answer

Collecting duct → renal pelvis → ureter → urinary bladder → urethra

Question 12

Which of the following best describes the role of podocytes in the glomerulus?

Accepted Answer

They form filtration slits that restrict passage of large molecules.

Question 13

A patient is found to have protein in their urine (proteinuria). Which part of the nephron is most likely damaged?

Accepted Answer

Filtration membrane of the glomerulus

Question 14

Which of the following best describes the difference between excretion and elimination in the urinary system?

Accepted Answer

Excretion is the removal of metabolic wastes from body fluids; elimination is the discharge of these wastes from the body.

Question 15

Which of the following is a function of the renal corpuscle?

Accepted Answer

Filtration of blood to form a protein-free filtrate

Question 16

A patient is experiencing metabolic acidosis. Which function of the urinary system is most important in correcting this condition?

Accepted Answer

Controlling loss of hydrogen and bicarbonate ions in urine

Question 17

Which of the following best describes the role of the collecting duct in urine formation?

Accepted Answer

Variable reabsorption of water and reabsorption or secretion of sodium, potassium, hydrogen, and bicarbonate ions

Question 18

If the renal artery is blocked, which of the following is the most immediate consequence?

Accepted Answer

Reduced blood flow to the kidney, leading to decreased urine production

Question 19

Which of the following best explains why the left kidney is positioned slightly higher than the right kidney?

Accepted Answer

The presence of the liver on the right side displaces the right kidney downward.

Question 20

Which of the following best describes the function of the urinary bladder?

Accepted Answer

Temporary storage of urine prior to urination

The Urinary System: Structure and Function

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