Q: Which of the following equations best represents the percentage of cardiac output ($$CO) $$delivered to the kidneys if $$CO = 4800\ \mathrm{ml/min}$$ and the renal arteries deliver $$1200\ \mathrm{ml/min}$$?

$$\frac{1200}{4800} \times 100 = 25\%$$

Question 1

Which of the following is a primary function of the kidneys?

Accepted Answer

Filtration of blood to excrete metabolic wastes and recover essential electrolytes

Question 2

A patient with chronic kidney disease is unable to regulate their blood pressure effectively. Which hormone produced by the kidneys is most directly involved in this process?

Accepted Answer

Renin

Question 3

Which sequence correctly traces the flow of urine from its formation to its exit from the body?

Accepted Answer

Renal cortex → renal medulla → renal pelvis → ureter → urinary bladder → urethra

Question 4

The right kidney is positioned lower than the left kidney. What is the anatomical reason for this difference?

Accepted Answer

The presence of the large right lobe of the liver

Question 5

Which supportive tissue layer of the kidney is responsible for anchoring the kidney and adrenal gland to surrounding structures?

Accepted Answer

Renal fascia

Question 6

A patient suffers a penetrating injury that damages the innermost protective layer of the kidney. Which layer is most likely affected?

Accepted Answer

Fibrous capsule

Question 7

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

Accepted Answer

Nephron

Question 8

The glomerulus is best described as:

Accepted Answer

A cluster of fenestrated capillaries that filter blood plasma

Question 9

Which of the following best describes the role of podocytes in the glomerular capsule?

Accepted Answer

They form filtration slits that allow selective passage of substances from blood into the filtrate

Question 10

If the renal plexus is damaged, which of the following kidney functions would be most directly affected?

Accepted Answer

Regulation of glomerular arteriole diameter

Question 11

A blockage in the minor calyces would directly prevent urine from draining from which structure?

Accepted Answer

Renal pyramid papillae

Question 12

Which region of the kidney contains the majority of nephrons and is responsible for the initial formation of urine?

Accepted Answer

Renal cortex

Question 13

A patient is found to have protein in their urine (proteinuria). Which structure is most likely damaged to allow proteins to pass into the filtrate?

Accepted Answer

Podocyte filtration slits

Question 14

Which of the following best explains why the kidneys receive approximately 25% of the cardiac output?

Accepted Answer

They must filter large volumes of blood to maintain homeostasis

Question 15

Which of the following is the correct order of structures that urine passes through, starting from the collecting ducts?

Accepted Answer

Collecting ducts → pyramid papillae → minor calyces → major calyces → renal pelvis → ureter

Question 16

Which of the following best describes the function of the perirenal adipose capsule?

Accepted Answer

It cushions the kidney and helps attach it to the posterior body wall

Question 17

A patient with impaired gluconeogenesis during prolonged fasting is likely to have dysfunction in which organ?

Accepted Answer

Kidney

Question 18

Which of the following equations best represents the percentage of cardiac output ($$CO) $$delivered to the kidneys if $$CO = 4800\ \mathrm{ml/min}$$ and the renal arteries deliver $$1200\ \mathrm{ml/min}$$?

Accepted Answer

$$\frac{1200}{4800} 	imes 100 = 25\%$$

Question 19

Which of the following is NOT a component of the renal corpuscle?

Accepted Answer

Proximal convoluted tubule

Question 20

Damage to which structure would most directly impair the kidney's ability to prevent infection from spreading into its tissue?

Accepted Answer

Fibrous capsule

The Urinary System: Structure and Function (Chapter 25, Part I)

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