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12 Questions

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Nephrology: Loop of Henle Review

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Questions and Answers

What percentage of water is reabsorbed in the proximal tubule, which is non-regulated?

30%

20%

70% (correct)

10%

What is the minimum volume of water that must be excreted in urine per day?

550 mL

220 mL

330 mL

440 mL (correct)

What is the maximum osmolarity of urine?

1000 mOsm

1600 mOsm

1200 mOsm

1400 mOsm (correct)

In which part of the nephron is water reabsorption regulated by ADH?

Collecting duct Signup and view all the answers

What percentage of water is reabsorbed in the distal tubules, which is regulated by ADH?

20% Signup and view all the answers

What is the role of the medullary osmotic gradient in water reabsorption?

It facilitates water reabsorption Signup and view all the answers

What is the main function of aquaporins in the descending loop of Henle?

To make the descending loop permeable to water Signup and view all the answers

What is the primary role of urea in the nephron?

To generate the necessary osmotic gradient in the loop of Henle Signup and view all the answers

What is the name of the capillaries surrounding the loop of Henle and nephrons?

Vasa recta Signup and view all the answers

What is the direction of water movement in the descending limb of the vasa recta?

From the capillaries into the interstitial fluid Signup and view all the answers

What is the primary function of the urea transporter A (UTA) in the nephron?

To transport urea from the filtrate to the peritubular fluid Signup and view all the answers

What is the direction of fluid movement in the ascending limb of the vasa recta?

From the interstitial fluid into the capillaries Signup and view all the answers