Question 1

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

Accepted Answer

Producing hormones that regulate blood glucose

Question 2

A patient presents with a kidney stone (renal calculus). Which structure is most likely to be directly affected by the passage of this stone from the kidney to the bladder?

Accepted Answer

Ureter

Question 3

Which of the following best describes the location of the kidneys?

Accepted Answer

Retroperitoneally in the posterior abdominal wall, lateral to $T_{12}$–$L_3$ vertebrae

Question 4

Which of the following is the correct order of blood flow through the arteries of the kidney?

Accepted Answer

Renal artery $\rightarrow$ Segmental artery $\rightarrow$ Interlobar artery $\rightarrow$ Arcuate artery $\rightarrow$ Cortical radiate artery

Question 5

Which part of the nephron is primarily responsible for the reabsorption of most nutrients, water, and essential ions?

Accepted Answer

Proximal convoluted tubule

Question 6

What is the main function of the vasa recta in the kidney?

Accepted Answer

Maintaining the medullary osmotic gradient

Question 7

Which of the following statements about the filtration membrane in the renal corpuscle is TRUE?

Accepted Answer

It allows passage of water, ions, glucose, amino acids, and urea, but holds back most proteins.

Question 8

A patient is unable to concentrate urine and is found to have a deficiency in antidiuretic hormone (ADH). Which part of the nephron is most directly affected by this deficiency?

Accepted Answer

Collecting duct

Question 9

Which of the following best explains why the ascending limb of the loop of Henle is important for urine concentration?

Accepted Answer

It actively transports $Na^+$ ions into the interstitial fluid, creating a medullary osmotic gradient.

Question 10

Which of the following is a correct description of the difference between cortical and juxtamedullary nephrons?

Accepted Answer

Juxtamedullary nephrons have loops that extend deep into the medulla and help concentrate urine.

Question 11

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

Accepted Answer

Reduced urine flow from the affected kidney to the bladder

Question 12

Which of the following best describes the process of micturition?

Accepted Answer

It is the act of emptying the bladder, involving both autonomic and somatic pathways.

Question 13

Which of the following is a main nitrogenous waste product excreted in urine?

Accepted Answer

Urea

Question 14

Which of the following layers of the ureter is responsible for peristaltic movement of urine toward the bladder?

Accepted Answer

Muscularis (inner longitudinal and outer circular layers)

Question 15

A newborn is diagnosed with a horseshoe kidney. Which of the following best describes this condition?

Accepted Answer

The kidneys are fused together during development in the womb.

Question 16

Which of the following best explains why the glomerular capillaries are fenestrated?

Accepted Answer

To allow efficient filtration of water and small solutes while retaining blood cells and most proteins

Question 17

Which of the following embryonic kidney structures persists to become the adult kidney?

Accepted Answer

Metanephros

Question 18

Which of the following best describes the epithelial lining of the urinary bladder?

Accepted Answer

Transitional epithelium

Question 19

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 20

Which of the following best explains why the descending limb of the loop of Henle is important for water reabsorption?

Accepted Answer

It is permeable to water but impermeable to most solutes, allowing water to leave the filtrate.

The Urinary System: Structure and Function

Study Guide - Practice Questions

Study Guide - Flashcards