MEDICAL
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Proximal tubule.
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Henle’s loop.
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Collecting duct.
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Bowman’s capsule.
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Detailed explanation-1: -Reabsorption of useful substances from glomerular filtrate occurs in proximal convoluted tubule (PCT). PCT is lined by simple cuboidal brush border epithelium which increases the surface area for reabsorption.
Detailed explanation-2: -From the Bowman’s capsule, the glomerular filtrate enters the proximal convoluted tubule (PCT). Most of the useful substances such as glucose, amino acids, most of the inorganic ions (Na+, K+, Cl−) and buffer bicarbonates are reabsorbed in PCT.
Detailed explanation-3: -The proximal tubules reabsorb about 65% of water, sodium, potassium and chloride, 100% of glucose, 100% amino acids, and 85-90% of bicarbonate. This reabsorption occurs due to the presence of channels on the basolateral (facing the interstitium) and apical membranes (facing the tubular lumen).