Q: The net filtration pressure (NFP) in the glomerulus is calculated using Starling forces. Which equation correctly represents NFP?

$$\text{NFP} = (\text{BHP}) - (\text{CHP} + \text{BCOP})$$

Question 1

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

Accepted Answer

Production of digestive enzymes

Question 2

A patient with kidney disease has plasma proteins leaking into the glomerular filtrate, causing capsular oncotic pressure (CCOP) to rise to 10 mmHg. What is the most likely consequence?

Accepted Answer

Increased filtration and risk of edema

Question 3

Which nitrogenous waste is the most abundant in urine and is a by-product of protein catabolism?

Accepted Answer

Urea

Question 4

The net filtration pressure (NFP) in the glomerulus is calculated using Starling forces. Which equation correctly represents NFP?

Accepted Answer

$$	ext{NFP} = (	ext{BHP}) - (	ext{CHP} + 	ext{BCOP})$$

Question 5

Which anatomical structure is responsible for filtering plasma to form urine?

Accepted Answer

Renal corpuscle

Question 6

What is the primary function of the juxtaglomerular apparatus (JGA)?

Accepted Answer

Regulation of blood pressure

Question 7

Which of the following would most likely decrease glomerular filtration rate (GFR)?

Accepted Answer

Constriction of the afferent arteriole

Question 8

A patient is severely dehydrated, leading to increased plasma protein concentration. What effect does this have on net filtration pressure (NFP) and GFR?

Accepted Answer

NFP decreases, GFR decreases

Question 9

Which segment of the nephron is primarily responsible for the reabsorption of 65% of filtered water, Na+, and K+, and 100% of glucose and amino acids?

Accepted Answer

Proximal convoluted tubule (PCT)

Question 10

Which hormone increases water reabsorption in the collecting duct by inserting aquaporin-2 channels?

Accepted Answer

Antidiuretic hormone (ADH)

Question 11

Which type of nephron is responsible for concentrating or diluting urine and has a long loop of Henle extending deep into the medulla?

Accepted Answer

Juxtamedullary nephron

Question 12

What is the effect of atrial natriuretic peptide (ANP) on glomerular filtration rate (GFR)?

Accepted Answer

Increases GFR by relaxing mesangial cells

Question 13

Which process in the nephron involves the movement of waste materials from the blood to the filtrate?

Accepted Answer

Tubular secretion

Question 14

During exercise, sympathetic nervous activity (SNA) causes equal constriction of afferent and efferent arterioles. What is the effect on GFR?

Accepted Answer

GFR remains relatively unchanged

Question 15

Which of the following is TRUE regarding the thick ascending limb of the nephron loop?

Accepted Answer

It is impermeable to water and permeable to solutes

Question 16

A patient with hyperaldosteronism is likely to develop edema. Which mechanism best explains this?

Accepted Answer

Increased Na+ reabsorption leads to increased water retention and plasma volume

Question 17

Which of the following substances is reabsorbed in the proximal convoluted tubule (PCT) by a Na+-glucose symporter?

Accepted Answer

Glucose

Question 18

Which hormone stimulates distal convoluted tubule (DCT) cells to reabsorb calcium when plasma calcium is low?

Accepted Answer

Parathyroid hormone

Question 19

If the transport maximum (Tm) for glucose is exceeded, what will occur?

Accepted Answer

Glucose will appear in the urine (glucosuria)

Question 20

Which of the following best describes the effect of angiotensin II on the kidneys?

Accepted Answer

It decreases GFR by constricting both afferent and efferent arterioles

The Urinary System: Structure, Function, and Physiology

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