Question 1

Which of the following is NOT a function of the kidneys?

Accepted Answer

Secretion of digestive enzymes

Question 2

A patient presents with glucose in their urine. Which renal process has most likely reached its maximum capacity?

Accepted Answer

Tubular reabsorption

Question 3

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

Accepted Answer

$$NFP = HPgc - (HPcs + OPgc)$$

Question 4

Which structure is responsible for the majority of water and solute reabsorption in the nephron?

Accepted Answer

Proximal convoluted tubule

Question 5

A drug that inhibits the action of antidiuretic hormone (ADH) will have what effect on urine?

Accepted Answer

Decrease urine concentration and increase urine volume

Question 6

Which of the following best describes the role of the juxtamedullary nephron?

Accepted Answer

It is responsible for forming concentrated urine via the countercurrent multiplier.

Question 7

Which hormone increases sodium reabsorption in the distal convoluted tubule and collecting duct, thereby increasing blood pressure?

Accepted Answer

Aldosterone

Question 8

A patient with severe dehydration will likely have which of the following changes in their urine?

Accepted Answer

Urine becomes more concentrated, with osmolality approaching 1200 mOsm

Question 9

Which of the following is a correct sequence for the flow of filtrate through the nephron?

Accepted Answer

Glomerulus → Proximal convoluted tubule → Nephron loop → Distal convoluted tubule → Collecting duct

Question 10

Which of the following pressures directly opposes glomerular hydrostatic pressure and inhibits filtrate formation?

Accepted Answer

Colloid osmotic pressure in capillaries

Question 11

Which of the following substances is NOT normally found in significant amounts in the urine of a healthy individual?

Accepted Answer

Glucose

Question 12

Which of the following best explains why proteins are not normally found in the filtrate of the nephron?

Accepted Answer

Proteins are too large to pass through the filtration membrane

Question 13

Which of the following would most likely result from a blockage in the efferent arteriole of the glomerulus?

Accepted Answer

Increased glomerular hydrostatic pressure and increased GFR

Question 14

Which of the following is the main force responsible for pushing water and solutes out of the blood and into the glomerular capsule?

Accepted Answer

Hydrostatic pressure in glomerular capillaries

Question 15

Which of the following best describes the effect of atrial natriuretic peptide (ANP) on the kidneys?

Accepted Answer

Decreases sodium reabsorption, decreasing blood volume

Question 16

A patient is given a loop diuretic. Which part of the nephron is most directly affected, and what is the result?

Accepted Answer

Nephron loop (Loop of Henle); decreased medullary osmotic gradient

Question 17

Which of the following is a primary function of tubular secretion?

Accepted Answer

Elimination of drugs and metabolites bound to plasma proteins

Question 18

Which of the following best describes the countercurrent multiplier system in the nephron?

Accepted Answer

It creates a medullary osmotic gradient using the nephron loop

Question 19

Which of the following would most likely be found in the urine of a patient with uncontrolled diabetes mellitus?

Accepted Answer

High levels of glucose

Question 20

Which of the following is the correct relationship between glomerular filtration rate (GFR) and blood pressure?

Accepted Answer

Increased GFR leads to increased urine output and decreased blood pressure

Urinary System: Structure, Function, and Physiology

Study Guide - Practice Questions