Question 1

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

Accepted Answer

Synthesis of bilirubin

Question 2

Which anatomical structure is responsible for filtering, reabsorbing, and secreting substances in the urinary system?

Accepted Answer

Kidneys

Question 3

The renal cortex is best described as:

Accepted Answer

The outer layer of the kidney

Question 4

Which of the following correctly describes the pathway of urine from its formation to excretion?

Accepted Answer

Nephron → Collecting duct → Renal papilla → Minor calyx → Major calyx → Renal pelvis → Ureter → Urinary bladder → Urethra → Outside body

Question 5

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

Accepted Answer

Antidiuretic hormone (ADH)

Question 6

What is the main driving force for glomerular filtration in the kidneys?

Accepted Answer

Blood pressure

Question 7

Which process involves the selective movement of molecules from renal tubules back into the blood?

Accepted Answer

Reabsorption

Question 8

Aldosterone acts primarily on which part of the nephron?

Accepted Answer

Distal convoluted tubule

Question 9

If blood pressure falls below a certain point, what is the consequence for glomerular filtration?

Accepted Answer

Filtration stops

Question 10

Which of the following is a normal component of urine?

Accepted Answer

Urea

Question 11

Which structure prevents the backflow of urine from the bladder into the ureters?

Accepted Answer

Flaps of mucosa at ureter openings

Question 12

During micturition, which muscle contracts to force urine through the internal urethral sphincter?

Accepted Answer

Detrusor muscle

Question 13

Which of the following best describes the role of the juxtaglomerular apparatus?

Accepted Answer

It releases renin in response to low blood pressure

Question 14

Which equation best represents the relationship between glomerular filtration rate (GFR), blood pressure (BP), and plasma protein concentration ($$C_{protein}$$)?

Accepted Answer

$$GFR = BP - C_{protein}$$

Question 15

A patient presents with a urine output of less than 30cc/hour. Which condition is most likely indicated?

Accepted Answer

Kidney failure

Question 16

Which of the following is TRUE regarding the composition of normal urine?

Accepted Answer

It is 95% water

Question 17

Which process in the nephron is primarily responsible for the removal of drugs such as penicillin from the blood?

Accepted Answer

Tubular secretion

Question 18

Which hormone is released by the adrenal cortex and increases sodium reabsorption in the distal convoluted tubule?

Accepted Answer

Aldosterone

Question 19

Which of the following statements about the nephron is correct?

Accepted Answer

It consists of a renal corpuscle and a renal tubule

Question 20

Which of the following would most likely result in increased blood volume and blood pressure?

Accepted Answer

Increased aldosterone secretion

The Urinary System: Structure, Function, and Regulation

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