The process that moves glucose from the proximal convoluted tubule int...
The selective reabsorption occurs in Helens loop i.e.,PCT and DCT which further ends in capillaries
The process that moves glucose from the proximal convoluted tubule int...
Selective Reabsorption Process in the Proximal Convoluted Tubule:
Selective reabsorption is a crucial process that occurs in the nephron, specifically in the proximal convoluted tubule, to ensure that essential substances like glucose are retained in the body while waste products are excreted.
Steps Involved:
- Filtration: Initially, blood is filtered in the glomerulus, producing a filtrate that contains glucose, water, ions, and other solutes. This filtrate then enters the proximal convoluted tubule.
- Selective Reabsorption: In the proximal convoluted tubule, glucose is reabsorbed from the filtrate back into the bloodstream through the peritubular capillaries. This process is known as selective reabsorption.
- Transport Proteins: Specialized transport proteins on the membrane of the proximal convoluted tubule cells facilitate the reabsorption of glucose. These proteins actively transport glucose molecules from the tubule into the cells, where they can then diffuse into the bloodstream.
- Energy Requirement: Selective reabsorption of glucose requires energy in the form of ATP to move glucose against its concentration gradient. This ensures that glucose is effectively retained in the body.
- Water Reabsorption: Along with glucose, water and other essential solutes are also reabsorbed in the proximal convoluted tubule through selective reabsorption, maintaining the body's fluid balance.
Therefore, the correct answer to the question is option 'D' - Selective reabsorption, as it accurately describes the process by which glucose is moved from the proximal convoluted tubule into the peritubular capillaries in the kidney nephron.
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