$$\text{NFP} = (\text{HP}_{\text{gc}}) - (\text{HP}_{\text{cs}} + \text{OP}_{\text{gc}})$$

Question 1

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

Accepted Answer

Production of bile for fat digestion

Question 2

A patient presents with a kidney infection that has spread to the renal pelvis and calyces. What is the medical term for this condition?

Accepted Answer

Pyelitis

Question 3

Which layer of the kidney provides a fatty cushion and helps protect it from trauma?

Accepted Answer

Perirenal fat capsule

Question 4

The correct sequence of urine flow from the renal pyramid to the ureter is:

Accepted Answer

Renal pyramid → minor calyx → major calyx → renal pelvis → ureter

Question 5

Which cell type in the collecting duct is primarily responsible for maintaining water and sodium balance?

Accepted Answer

Principal cell

Question 6

A patient with chronic hypertension is found to have a GFR of 50 ml/min for over 3 months. What condition does this indicate?

Accepted Answer

Chronic renal disease

Question 7

Which equation correctly represents Net Filtration Pressure (NFP) in the glomerulus?

Accepted Answer

$$	ext{NFP} = (	ext{HP}_{	ext{gc}}) - (	ext{HP}_{	ext{cs}} + 	ext{OP}_{	ext{gc}})$$

Question 8

Which segment of the nephron loop is permeable to water but not to solutes?

Accepted Answer

Descending limb

Question 9

Which hormone increases water reabsorption by causing insertion of aquaporins in the collecting duct?

Accepted Answer

Antidiuretic hormone (ADH)

Question 10

A patient with diabetes mellitus has glucose in their urine. This is most likely due to:

Accepted Answer

Saturation of glucose transporters exceeding the transport maximum ($$T_m)$$

Question 11

Which capillary bed is specialized for filtration and is fed and drained by arterioles?

Accepted Answer

Glomerulus

Question 12

Which mechanism is responsible for maintaining the osmotic gradient in the renal medulla, allowing the kidney to produce concentrated urine?

Accepted Answer

Countercurrent multiplier

Question 13

Which of the following would most likely result in the formation of kidney stones (renal calculi)?

Accepted Answer

Chronic bacterial infection and high urine pH

Question 14

Which of the following is TRUE regarding the female urethra?

Accepted Answer

It is tightly bound to the anterior vaginal wall

Question 15

Which of the following is a correct formula for renal clearance?

Accepted Answer

$$C = \frac{U 	imes V}{P}$$

Question 16

Which segment of the nephron is the site of most reabsorption, including all nutrients, 65% of Na+ and water, and many ions?

Accepted Answer

Proximal convoluted tubule

Question 17

Which of the following would most likely be found in the urine of a healthy individual?

Accepted Answer

Urea

Question 18

Which process is responsible for selectively moving substances from blood to filtrate in the renal tubules and collecting ducts?

Accepted Answer

Tubular secretion

Question 19

Which hormone is released by cardiac atrial cells and reduces blood Na+, leading to decreased blood volume and pressure?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 20

A patient is severely dehydrated. Which of the following would you expect regarding their urine?

Accepted Answer

Small volume of concentrated urine with high osmolality (~1200 mOsm)

The Urinary System: Structure, Function, and Physiology

Study Guide - Practice Questions