ANIMAL PHYSIOLOGY
EXCRETION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Microvilli to increase surface area of inner surface
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Many mitochondria
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Co-transporter proteins in membrane facing lumen
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Cell membrane permeable to water.
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Detailed explanation-1: -The epithelial cells of the proximal convoluted tubule are adapted for reabsorption by having microscopic projections called microvilli.
Detailed explanation-2: -The PCT is responsible for reabsorbing most of the glucose, amino acids, and small peptides that enter the ultrafiltrate (Berry and Rector 1991). The PCT contains numerous secondary active, sodium-coupled transporters for glucose (SGLT2) and amino acids (Silbernagl and Gekle 2008; Silverman 2008).
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.
Detailed explanation-4: -First, the proximal convoluted tubule-which is the longest part of the renal tubule-has a simple tall cuboidal epithelium, with a brush border (microvilli). The epithelium almost fills the lumen, and the microvilli increases the surface area by 30-40 fold.