GENERAL HISTOLOGY

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EXCRETORY SYSTEM

KIDNEY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following are true of the Loop of Henle’s role in osmoregulation?I. The ascending limb is impermeable to waterII. The descending limb is impermeable to Na+III. It creates a hypotonic region in the medulla
A
I and II only
B
I and III only
C
II and III only
D
I, II and III
Explanation: 

Detailed explanation-1: -Final answer: The correct statement regarding Henle’s loop is that the ascending limb of the loop of Henle is impermeable to water.

Detailed explanation-2: -The principal function of the loop of Henle is in the recovery of water and sodium chloride from urine. This function allows production of urine that is far more concentrated than blood, limiting the amount of water needed as intake for survival.

Detailed explanation-3: -The thick ascending limb of Henle’s loop actively reabsorbs sodium chloride (NaCl) but is impermeable to water.

Detailed explanation-4: -The descending portion of the loop of Henle is extremely permeable to water and is less permeable to ions, therefore water is easily reabsorbed here and solutes are not readily reabsorbed.

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