$$GFR = Net\ Filtration\ Pressure \times Filtration\ Coefficient$$

Question 1

Which of the following is NOT a primary function of the urinary system as filtrate is converted to urine?

Accepted Answer

Production of digestive enzymes

Question 2

The kidneys help regulate blood pressure primarily by:

Accepted Answer

Adjusting the volume of water excreted in urine

Question 3

Which hormone is released by the kidneys in response to low blood oxygen and stimulates red blood cell production?

Accepted Answer

Erythropoietin (EPO)

Question 4

Which structure is the functional filtration unit of the kidney?

Accepted Answer

Nephron

Question 5

The glomerular filtration rate (GFR) is most directly determined by which of the following equations?

Accepted Answer

$$GFR = Net\ Filtration\ Pressure 	imes Filtration\ Coefficient$$

Question 6

Which of the following best describes the role of podocytes in the filtration membrane?

Accepted Answer

They form filtration slits that restrict passage of large proteins.

Question 7

A patient with high levels of plasma proteins in their urine likely has damage to which part of the filtration membrane?

Accepted Answer

Basement membrane of the glomerulus

Question 8

Which process in urine formation involves the movement of solutes from the blood into the tubular fluid, usually by active transport?

Accepted Answer

Secretion

Question 9

If the afferent arteriole of the glomerulus constricts, what is the expected effect on glomerular filtration rate (GFR)?

Accepted Answer

GFR decreases

Question 10

Which of the following ions is most important for acid-base balance in the kidneys?

Accepted Answer

H	extsuperscript{+}

Question 11

Which segment of the nephron is primarily responsible for reabsorbing glucose from the filtrate?

Accepted Answer

Proximal convoluted tubule (PCT)

Question 12

Aldosterone acts on which part of the nephron to increase sodium reabsorption?

Accepted Answer

Collecting duct and distal convoluted tubule

Question 13

Which of the following best explains why the glomerular hydrostatic pressure (HP	extsubscript{g}) is higher than in other systemic capillaries?

Accepted Answer

The efferent arteriole has a smaller diameter than the afferent arteriole.

Question 14

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

Accepted Answer

Glomerulus → PCT → Nephron loop → DCT → Collecting duct

Question 15

Which cells in the collecting duct help regulate urine pH and blood pH?

Accepted Answer

Intercalated cells (types A and B)

Question 16

During prolonged fasting or starvation, the kidneys help maintain blood glucose levels by:

Accepted Answer

Engaging in gluconeogenesis

Question 17

Which of the following best describes the effect of increased net filtration pressure on glomerular filtration rate (GFR)?

Accepted Answer

GFR increases

Question 18

A patient is given a drug that blocks antidiuretic hormone (ADH). What is the expected effect on urine output?

Accepted Answer

Urine output increases

Question 19

Which anatomical structure connects the kidney to the urinary bladder?

Accepted Answer

Ureter

Question 20

Which of the following is a correct description of the movement of water and solutes during glomerular filtration?

Accepted Answer

Water and solutes move from the blood plasma across the filtration membrane into the capsular space.

Urinary System: Structure, Function, and Physiology

Guida di studio - Domande di pratica