HISTOLOGY
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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H2O
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Urea
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Vitamins
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Lactate
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Detailed explanation-1: -This part of the nephron is called the loop of Henle. Its main function is to reabsorb water and sodium chloride from the filtrate. This conserves water for the organism, producing highly concentrated urine.
Detailed explanation-2: -The descending limb is highly permeable to water, with reabsorption occurring passively via aquaporin-1 (AQP1) channels. Small amounts of urea, sodium (Na+) and other ions are also reabsorbed.
Detailed explanation-3: -Water reabsorption occurs in the thin descending limb of the Loop of Henle. It is permeable to water, which means that H2O molecules are freely able to leave it. Similarly to in the PCT, water can leave the thin descending limb into the more concentrated medulla through transcellular and paracellular movement.