$$\text{EFP} = (\text{Glomerular hydrostatic pressure}) - (\text{Capsular hydrostatic pressure} + \text{Blood colloid osmotic pressure})$$

Bicarbonate ions ($$\text{HCO}_3^-)$$

Question 1

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

Accepted Answer

Production of hormones for digestion

Question 2

A patient presents with trauma to the lower back. Which protective covering of the kidney is most likely to be damaged first?

Accepted Answer

Adipose capsule

Question 3

Which equation correctly represents the calculation of effective filtration pressure (EFP) in the renal corpuscle?

Accepted Answer

$$	ext{EFP} = (	ext{Glomerular hydrostatic pressure}) - (	ext{Capsular hydrostatic pressure} + 	ext{Blood colloid osmotic pressure})$$

Question 4

Which structure is responsible for the majority of tubular reabsorption in the nephron?

Accepted Answer

Proximal convoluted tubule (PCT)

Question 5

A patient with a high blood glucose level is found to have glucose in their urine. Which process in the nephron has failed to function properly?

Accepted Answer

Tubular reabsorption

Question 6

Which of the following best describes the difference between cortical and juxtamedullary nephrons?

Accepted Answer

Juxtamedullary nephrons have longer loops of Henle that extend deep into the medulla, allowing for more concentrated urine.

Question 7

Which of the following substances is commonly secreted into the filtrate by tubule cells during tubular secretion?

Accepted Answer

Hydrogen ions (H+)

Question 8

The countercurrent multiplier mechanism in the loop of Henle is essential for:

Accepted Answer

Creating a concentration gradient in the medulla to allow for concentrated urine formation

Question 9

Which equation correctly represents renal clearance ($$C) $$for a substance?

Accepted Answer

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

Question 10

Which of the following is a normal constituent of urine?

Accepted Answer

Urea

Question 11

During micturition, which muscle contracts to expel urine from the bladder?

Accepted Answer

Detrusor muscle

Question 12

Which of the following mechanisms is used to buffer acid in urine?

Accepted Answer

Bicarbonate ions ($$	ext{HCO}_3^-)$$

Question 13

A patient with hypertension is found to have increased renin secretion. Which part of the nephron is most directly involved in this response?

Accepted Answer

Juxtaglomerular apparatus

Question 14

Which of the following best describes the process of glomerular filtration?

Accepted Answer

Movement of water and solutes from the blood into the glomerular capsule due to pressure gradients

Question 15

Which of the following would most likely decrease the glomerular filtration rate (GFR)?

Accepted Answer

Constriction of the afferent arteriole

Question 16

Which of the following is TRUE regarding the blood supply to the kidneys?

Accepted Answer

The renal artery branches directly from the abdominal aorta

Question 17

Which of the following scenarios would most likely result in acidification of urine?

Accepted Answer

Increased secretion of hydrogen ions (H+)

Question 18

Which of the following is a function of the ureters?

Accepted Answer

Transport urine from the kidneys to the bladder

Question 19

A patient is unable to voluntarily control urination. Which structure is most likely impaired?

Accepted Answer

External urethral sphincter

Question 20

Which of the following best explains how intrinsic controls adjust glomerular filtration rate (GFR)?

Accepted Answer

By autoregulation mechanisms such as the myogenic response and tubuloglomerular feedback

The Urinary System: Structure, Function, and Physiology

Study Guide - Practice Questions