HISTOLOGY
URINARY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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At which of these sites is the osmotic pressure lowest? (least concentrated filtrate)
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glomerular capillary
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proximal tubule
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bottom of the loop of Henle
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first part of the distal tubule
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collecting duct
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Explanation:
Detailed explanation-1: -The thick ascending limb is nearly impermeable to water and no aquaporin proteins have been detected in this nephron segment (reviewed in [1]). The thick ascendling limb has a low NaCl permeability, but it vigorously transports NaCl from the tubular lumen to the medullary interstitium by an active transport mechanism.
Detailed explanation-2: -The filtrate flows from the proximal tubule and into the Loop of Henle. The loop of Henle concentrates the filtrate, by removing more water from it, and passes it to the distal tubule.
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