Question 1

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

Accepted Answer

Production of bile for fat digestion

Question 2

Which organ is responsible for filtering blood and excreting toxic metabolic wastes?

Accepted Answer

Kidney

Question 3

What is the correct sequence of structures that urine passes through from its formation to its exit from the body?

Accepted Answer

Glomerular capsule → proximal convoluted tubule → nephron loop → distal convoluted tubule → collecting duct → papillary duct → minor calyx → major calyx → renal pelvis → ureter → urinary bladder → urethra

Question 4

Which of the following nitrogenous wastes is produced from the breakdown of nucleic acids?

Accepted Answer

Uric acid

Question 5

A patient presents with elevated blood urea nitrogen (BUN). Which condition is most likely indicated?

Accepted Answer

Azotemia

Question 6

Which of the following body systems does NOT play a significant role in excretion?

Accepted Answer

Endocrine system

Question 7

The kidneys are located retroperitoneally. Which statement best describes this position?

Accepted Answer

They are positioned behind the peritoneum along with the ureters, urinary bladder, renal artery and vein, and adrenal glands.

Question 8

Which layer of the kidney provides protection from trauma and infection?

Accepted Answer

Fibrous capsule

Question 9

What is the function of the renal parenchyma?

Accepted Answer

It forms urine through glandular tissue.

Question 10

Which of the following correctly matches the kidney zone with its description?

Accepted Answer

Renal cortex: outer zone containing extensions called renal columns

Question 11

Which vessel directly supplies blood to the glomerulus?

Accepted Answer

Afferent arteriole

Question 12

What is the role of the efferent arteriole in renal circulation?

Accepted Answer

It drains blood from the glomerulus and leads to peritubular capillaries or vasa recta.

Question 13

Which part of the nephron is responsible for filtering the blood plasma?

Accepted Answer

Renal corpuscle

Question 14

The visceral layer of the glomerular capsule is composed of which specialized cells?

Accepted Answer

Podocytes

Question 15

Which of the following is the correct order of the regions of the renal tubule?

Accepted Answer

Proximal convoluted tubule → nephron loop → distal convoluted tubule → collecting duct

Question 16

Which type of nephron is most numerous in the kidney and has short nephron loops?

Accepted Answer

Cortical nephron

Question 17

Which of the following statements about glomerular filtration is TRUE?

Accepted Answer

It is a special case of capillary fluid exchange where water and some solutes pass from the glomerulus into the capsular space.

Question 18

Which of the following is NOT a barrier in the glomerular filtration membrane?

Accepted Answer

Transitional epithelium of the renal pelvis

Question 19

Which molecule is most likely to be excluded from the glomerular filtrate due to its size and charge?

Accepted Answer

Albumin

Question 20

A marathon runner experiences temporary proteinuria after a race. What is the most likely cause?

Accepted Answer

Reduced perfusion of the kidney leading to glomerular hypoxia and membrane deterioration

Urinary System: Structure, Function, and Filtration

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