Question 1

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

Accepted Answer

Regulation of blood glucose levels

Question 2

A patient has a tumor compressing the fat tissue around the kidneys. Which of the following is a likely consequence?

Accepted Answer

Increased risk of kidney injury due to loss of protection

Question 3

Which structure is the functional unit of the kidney responsible for urine formation?

Accepted Answer

Nephron

Question 4

The glomerulus is described as a 'leaky' capillary bed. What is the main advantage of this feature?

Accepted Answer

It allows filtration of water, ions, glucose, and small proteins into the tubule system

Question 5

Which part of the nephron is primarily responsible for the reabsorption of plasma and secretion/excretion of substances?

Accepted Answer

Proximal convoluted tubule

Question 6

A patient is producing large amounts of dilute urine. Which hormone is most likely deficient?

Accepted Answer

Antidiuretic hormone (ADH)

Question 7

Which of the following best describes the flow of filtrate through the nephron?

Accepted Answer

Bowman's capsule → Proximal convoluted tubule → Loop of Henle → Distal convoluted tubule → Collecting duct

Question 8

If the ascending limb of the loop of Henle is damaged, which process will be most affected?

Accepted Answer

Reabsorption of ions such as Na$$^+$$ and Cl$$^-$$

Question 9

Which of the following substances is NOT normally found in significant amounts in the urine of a healthy individual?

Accepted Answer

Glucose

Question 10

A patient with a genetic defect has a filtration membrane that allows large proteins to pass into the filtrate. What is a likely clinical consequence?

Accepted Answer

Proteinuria (protein in the urine)

Question 11

Which region of the kidney contains the renal pyramids?

Accepted Answer

Medulla

Question 12

Which of the following best explains why the kidneys are surrounded by a tough capsule and fat?

Accepted Answer

To protect the kidneys from physical trauma and maintain their position

Question 13

Which of the following is a nitrogenous waste product resulting from the breakdown of amino acids?

Accepted Answer

Urea

Question 14

If a person is dehydrated, which hormone will increase to help conserve water, and what effect will it have on the nephron?

Accepted Answer

ADH will increase, causing more water channels to appear in the DCT and collecting duct

Question 15

Which of the following best describes the role of the collecting duct in urine formation?

Accepted Answer

It receives filtrate from multiple nephrons and is the final site for water reabsorption

Question 16

A patient has a mutation that prevents the formation of ADH. What would you expect to find in their urine?

Accepted Answer

Large volume of dilute urine

Question 17

Which of the following equations best represents the relationship between urine output and water reabsorption in the nephron?

Accepted Answer

$$U = F - R$$

Question 18

Which of the following is a correct sequence for the regions of the kidney from outermost to innermost?

Accepted Answer

Cortex → Medulla → Renal sinus

Question 19

Which of the following best explains why urea is both lost in the urine and recycled in the nephron?

Accepted Answer

Urea helps maintain the osmotic gradient in the medulla, aiding water reabsorption

Question 20

Which of the following is a significant difference between the solute concentrations in urine and plasma?

Accepted Answer

Urine contains much higher concentrations of urea and creatinine than plasma

Urinary System and Kidneys: Structure and Function

Study Guide - Practice Questions

Study Guide - Flashcards