$$GFR = \frac{Urine\ Concentration \times Urine\ Flow\ Rate}{Plasma\ Concentration}$$

Question 1

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

Accepted Answer

Produce insulin

Question 2

Blood enters the kidney through the renal artery. Which vessel carries filtered blood away from the kidney?

Accepted Answer

Renal vein

Question 3

Which part of the nephron is primarily responsible for the filtration of blood?

Accepted Answer

Glomerulus

Question 4

Which of the following mechanisms is responsible for regulating glomerular filtration rate (GFR) in response to changes in blood pressure?

Accepted Answer

Myogenic mechanism

Question 5

Most of the filtrate filtered out of the glomerulus is reabsorbed into the blood. Which process is responsible for this reabsorption?

Accepted Answer

Selective reabsorption in the nephron tubules

Question 6

Which of the following substances is NOT typically reabsorbed in the nephron?

Accepted Answer

Creatinine

Question 7

A patient presents with urine that has a specific gravity of 1.030 and a dark yellow color. What does this most likely indicate?

Accepted Answer

Dehydration

Question 8

Which hormone increases the permeability of the collecting duct to water, resulting in more water reabsorption?

Accepted Answer

Antidiuretic hormone (ADH)

Question 9

Which of the following is a diuretic that increases the excretion of urine?

Accepted Answer

Caffeine

Question 10

A patient with diabetes mellitus has high blood glucose levels that exceed the renal threshold. What is the physiological consequence in the nephron?

Accepted Answer

Glucose remains in the filtrate, causing osmotic diuresis

Question 11

Which equation best represents the calculation of glomerular filtration rate (GFR)?

Accepted Answer

$$GFR = \frac{Urine\ Concentration 	imes Urine\ Flow\ Rate}{Plasma\ Concentration}$$

Question 12

Which of the following is a correct pathway for the flow of blood through the kidney?

Accepted Answer

Renal artery → Segmental artery → Interlobar artery → Arcuate artery → Cortical radiate artery → Afferent arteriole → Glomerulus

Question 13

Which of the following would most likely be found in the urine of a patient with a urinary tract infection (UTI)?

Accepted Answer

Blood and leukocytes

Question 14

Which muscle contracts during micturition to empty the bladder?

Accepted Answer

Detrusor muscle

Question 15

Which of the following is a correct description of the nephron?

Accepted Answer

The basic functional unit of the kidney

Question 16

Which of the following would most likely cause an increase in blood pressure by stimulating sodium reabsorption in the nephron?

Accepted Answer

Aldosterone

Question 17

Which of the following is a plausible effect of a high-protein diet on urine composition?

Accepted Answer

Urine pH becomes more acidic

Question 18

Which of the following is a common misconception about the function of the urethra?

Accepted Answer

It is the tube that connects the kidney to the bladder

Question 19

Which of the following is a correct statement about renal calculi?

Accepted Answer

They are also known as kidney stones

Question 20

Which of the following would most likely be secreted by the heart in response to high blood pressure, resulting in increased urine output?

Accepted Answer

Natriuretic peptide

Study Guide: The Urinary System (Chapter 25, Pearson Anatomy & Physiology)

Study Guide - Practice Questions