$$\text{NFP} = \text{HP}_g - (\text{OP}_g + \text{HP}_c)$$

$$\text{Urine Volume} = \text{GFR} \times (1 - \text{Reabsorption Fraction})$$

Question 1

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

Accepted Answer

Production of bile for fat digestion

Question 2

The kidneys are located retroperitoneally between which vertebral levels?

Accepted Answer

T12 to L3

Question 3

Which structure is responsible for the initial filtration of blood in the nephron?

Accepted Answer

Glomerulus

Question 4

What is the correct sequence of urine flow from the nephron to the outside of the body?

Accepted Answer

Renal corpuscle → PCT → nephron loop → DCT → collecting duct → minor calyx → major calyx → renal pelvis → ureter → urinary bladder → urethra

Question 5

Which part of the nephron is impermeable to water and is responsible for electrolyte reabsorption?

Accepted Answer

Ascending limb of nephron loop

Question 6

A patient with hypertension is at risk for which kidney pathology due to increased glomerular pressure?

Accepted Answer

Glomerular rupture and scarring

Question 7

If the glomerular filtration rate (GFR) increases significantly, what is the most likely consequence?

Accepted Answer

Dehydration and electrolyte depletion

Question 8

Which equation best represents the net filtration pressure (NFP) in the glomerulus?

Accepted Answer

$$	ext{NFP} = 	ext{HP}_g - (	ext{OP}_g + 	ext{HP}_c)$$

Question 9

Which mechanism allows the kidney to maintain a relatively stable GFR despite fluctuations in blood pressure?

Accepted Answer

Renal autoregulation

Question 10

During strenuous exercise, sympathetic stimulation causes which change in the kidney?

Accepted Answer

Constriction of afferent arterioles, reducing GFR and urine production

Question 11

Which hormone is released in response to low blood pressure and promotes sodium and water reabsorption in the distal convoluted tubule?

Accepted Answer

Aldosterone

Question 12

What is the primary effect of antidiuretic hormone (ADH) on the collecting duct?

Accepted Answer

Increases water reabsorption, decreasing urine volume

Question 13

Which of the following is a normal constituent of urine?

Accepted Answer

Urea

Question 14

A patient presents with hematuria and proteinuria after a traumatic injury. Which structure is most likely damaged?

Accepted Answer

Glomerulus

Question 15

Which of the following conditions is characterized by chronic polyuria with hyperglycemia and glycosuria?

Accepted Answer

Diabetes mellitus

Question 16

Which of the following would most likely cause the formation of kidney stones?

Accepted Answer

Dehydration

Question 17

Which equation best describes the relationship between urine volume and GFR?

Accepted Answer

$$	ext{Urine Volume} = 	ext{GFR} 	imes (1 - 	ext{Reabsorption Fraction})$$

Question 18

Which segment of the nephron is primarily responsible for reabsorbing nutrients such as glucose, amino acids, and vitamins?

Accepted Answer

Proximal convoluted tubule

Question 19

Which of the following is a plausible consequence of drinking salt water while stranded at sea?

Accepted Answer

Increased urine output leading to dehydration

Question 20

Which of the following is a plausible explanation for why females are more prone to urinary tract infections?

Accepted Answer

Shorter urethra allows easier bacterial ascent

Urinary System: Structure, Function, and Pathology

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