Question 1

Which of the following is NOT a primary function of the urinary system in maintaining homeostasis?

Accepted Answer

Synthesizing insulin for glucose regulation

Question 2

A patient presents with albumin in their urine. What does this most likely indicate about the glomerular filtration membrane?

Accepted Answer

It has increased permeability, possibly due to injury or disease

Question 3

Which layer of tissue surrounding the kidney provides protection from trauma?

Accepted Answer

Perinephric fat capsule (adipose capsule)

Question 4

Blood enters the glomerulus through which vessel?

Accepted Answer

Afferent arteriole

Question 5

Which of the following best describes the role of the juxtaglomerular apparatus (JGA)?

Accepted Answer

It regulates the rate of filtrate formation and blood pressure

Question 6

A rise in renal blood pressure causes which of the following responses in the afferent arteriole?

Accepted Answer

Constriction to decrease blood flow

Question 7

Which equation correctly represents the net filtration pressure (NFP) in the glomerulus?

Accepted Answer

$$NFP = GHP - CHP - GCOP$$

Question 8

Which part of the nephron is primarily responsible for reabsorbing glucose and amino acids?

Accepted Answer

Proximal convoluted tubule (PCT)

Question 9

During dehydration, which hormone is released to increase water reabsorption in the collecting ducts?

Accepted Answer

Antidiuretic hormone (ADH)

Question 10

Which of the following statements about the nephron loop is correct?

Accepted Answer

The descending limb is permeable to water but not solutes

Question 11

A patient with diabetes mellitus is found to have glucose in their urine. What is the most likely explanation?

Accepted Answer

The filtered glucose exceeds the reabsorptive capacity of the renal tubules

Question 12

Which of the following is a correct sequence for the flow of urine from its formation to elimination?

Accepted Answer

Renal pyramid → minor calyx → major calyx → renal pelvis → ureter → urinary bladder → urethra

Question 13

Which cells in the juxtaglomerular apparatus sense NaCl concentration in the filtrate?

Accepted Answer

Macula densa

Question 14

Which of the following mechanisms is responsible for the majority of water reabsorption in the nephron?

Accepted Answer

Osmosis

Question 15

Which hormone is released by the heart in response to increased blood volume and acts to decrease blood Na$$^+$$ concentration?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 16

Which of the following is TRUE regarding the renal blood supply?

Accepted Answer

Kidneys receive 20-25% of the resting cardiac output via the renal arteries

Question 17

Which process in the nephron is responsible for moving substances such as drugs and excess ions from the blood into the renal tubule?

Accepted Answer

Tubular secretion

Question 18

A patient is experiencing hematuria. Which of the following is the most likely cause?

Accepted Answer

Damage to the renal corpuscle

Question 19

Which of the following best describes the function of the collecting duct?

Accepted Answer

It receives filtrate from many nephrons and delivers urine to the minor calyces

Question 20

Which of the following is a correct description of the role of aldosterone in the kidney?

Accepted Answer

It increases Na$$^+$$ reabsorption and water retention, raising blood pressure

Chapter 24: The Urinary System – Structure and Function

Study Guide - Practice Questions