Where does the reabsorption of glucose primarily occur in the nephron?

• A. Distal convoluted tubule
• B. Proximal convoluted tubule
• C. Collecting duct
• D. Loop of Henle

Answer: (B)

Verified step by step guidance

1. Understand the structure of the nephron: The nephron is the functional unit of the kidney, consisting of several parts including the proximal convoluted tubule, loop of Henle, distal convoluted tubule, and collecting duct.
2. Identify the role of the proximal convoluted tubule: This segment of the nephron is responsible for the reabsorption of essential substances from the filtrate back into the bloodstream, including glucose, amino acids, and ions.
3. Recognize the mechanism of glucose reabsorption: Glucose is reabsorbed in the proximal convoluted tubule through active transport mechanisms involving specific transport proteins.
4. Differentiate between the functions of nephron segments: While the proximal convoluted tubule is primarily involved in reabsorption, other segments like the loop of Henle and distal convoluted tubule have different roles, such as concentrating urine and regulating ion balance.
5. Conclude that the proximal convoluted tubule is the primary site for glucose reabsorption, as it efficiently reclaims glucose from the filtrate before it progresses through the rest of the nephron.