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Question 25 Homeostasis

Which structural feature mainly creates the high hydrostatic pressure in glomerular capillaries?

Correct answer C. The efferent arteriole is narrower than the afferent arteriole

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Question 30 Homeostasis

What happens in the thick ascending limb of the loop of Henle?

Correct answer D. Na⁺ and Cl⁻ are actively transported out while water cannot follow

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Question 31 Homeostasis

What is the main role of the loop of Henle in mammals?

Correct answer C. Building a high solute concentration in the medulla so that concentrated urine can be produced

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Question 33 Homeostasis

How does ADH reduce water loss in urine?

Correct answer A. It makes the distal tubule and collecting duct more permeable to water

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Question 36 Homeostasis

Soon after a person drinks a litre of water, what change occurs?

Correct answer B. ADH secretion falls and a large volume of dilute urine is produced

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Question 38 Homeostasis

What is the main effect of aldosterone on the nephron?

Correct answer A. Increased reabsorption of Na⁺ and secretion of K⁺ in the distal tubule and collecting duct

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Question 40 Homeostasis

What is the correct sequence of events when blood volume falls?

Correct answer A. Renin release → angiotensin II formation → aldosterone secretion → more Na⁺ reabsorbed

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