Question 1

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

Accepted Answer

Production of digestive enzymes

Question 2

A patient presents with metabolic acidosis. Which function of the urinary system is most directly involved in correcting this condition?

Accepted Answer

Regulation of acid-base balance

Question 3

Which structure is the microscopic functional filtration unit of the kidney?

Accepted Answer

Nephron

Question 4

Which of the following correctly describes the flow of blood through the kidney?

Accepted Answer

Renal artery → Segmental artery → Interlobar artery → Arcuate artery → Interlobular artery

Question 5

Which part of the nephron is primarily responsible for the reabsorption of water and solutes from the filtrate back into the blood?

Accepted Answer

Proximal convoluted tubule (PCT)

Question 6

A drug that blocks the action of antidiuretic hormone (ADH) would most likely affect which part of the nephron?

Accepted Answer

Collecting duct

Question 7

Which of the following equations best represents the calculation of net filtration pressure (NFP) in the glomerulus?

Accepted Answer

$$NFP = GHP - (CHP + COP)$$

Question 8

Which type of nephron is most important for concentrating urine and is found primarily at the corticomedullary junction?

Accepted Answer

Juxtamedullary nephron

Question 9

A patient with a urinary tract infection is most likely to experience inflammation in which structure first?

Accepted Answer

Urethra

Question 10

Which of the following best describes the difference between the male and female urethra?

Accepted Answer

The male urethra is longer and passes through the prostate gland, while the female urethra is shorter and opens anterior to the vaginal opening.

Question 11

During the micturition reflex, which of the following events occurs to allow urine to be expelled from the bladder?

Accepted Answer

Contraction of the detrusor muscle and relaxation of the internal urethral sphincter

Question 12

Which hormone, produced by the posterior pituitary gland, increases water reabsorption in the kidneys?

Accepted Answer

Antidiuretic hormone (ADH)

Question 13

If the normal pH of urine ranges from 4.5 to 8.0, what would be the likely consequence of urine consistently measuring above 8.0?

Accepted Answer

Increased risk of kidney stones due to alkaline urine

Question 14

Which of the following is the correct order of urine flow from the nephron to the outside of the body?

Accepted Answer

Collecting duct → Renal pelvis → Ureter → Urinary bladder → Urethra

Question 15

Which of the following best describes glomerular filtration?

Accepted Answer

The movement of substances from the blood into the glomerulus and into the capsular space

Question 16

A patient is found to have a deficiency in erythropoietin. Which function of the urinary system is most directly affected?

Accepted Answer

Regulation of erythrocyte production

Question 17

Which of the following is a characteristic of urine that can be used to assess hydration status?

Accepted Answer

Color ranging from almost clear to dark yellow

Question 18

Which of the following structures is lined by transitional epithelium to allow for stretching as urine passes through?

Accepted Answer

Ureter

Question 19

Which equation best represents the relationship between urine output, water intake, and water loss in a healthy adult?

Accepted Answer

$$Urine\ Output = Water\ Intake - Water\ Loss_{other}$$

Question 20

Which of the following is TRUE regarding the characteristics of urine?

Accepted Answer

Normal urine contains nitrogenous wastes such as urea, uric acid, and creatinine

Anatomy & Physiology Study Notes: The Urinary System

Study Guide - Practice Questions