MEDICAL
KIDNEY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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microvilli
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many mitochondria
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basal invaginations
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all of these adaptations
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Detailed explanation-1: -The brush border and the extensive length of the proximal tubule dramatically increase the surface area available for reabsorption of substances into the blood enabling around 80% of the glomerular filtrate to be reabsorbed in this segment.
Detailed explanation-2: -The proximal convoluted tubule (PCT) uses both cellular and paracellular transport mechanisms. The apical membrane has an expanded surface area available for reabsorption and tight junctions enabling high-capacity fluid reabsorption.
Detailed explanation-3: -The lining of the proximal convoluted tubule is composed of a single layer of epithelial cells, which are adapted to carry out reabsorption in several ways: Microvilli. Co-transporter proteins. A high number of mitochondria.