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Main function of loop of Henle is...

Main function of loop of Henle is

A

Absorption of water

B

Absorption of sugar

C

Absorption of sodium

D

Secretion of ions

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Loop of Henle**: The Loop of Henle is a U-shaped portion of the nephron in the kidney, which plays a crucial role in the concentration of urine. 2. **Main Function**: The primary function of the Loop of Henle is to facilitate the reabsorption of water and salts from the filtrate back into the bloodstream. This process is essential for maintaining the body’s water balance. 3. **Mechanism of Action**: - The descending limb of the Loop of Henle is permeable to water but not to salts. As the filtrate moves down, water is reabsorbed into the surrounding medullary interstitium, concentrating the filtrate. - The ascending limb is impermeable to water but actively transports sodium and chloride ions out of the filtrate, diluting it as it ascends. 4. **Importance of Reabsorption**: This countercurrent mechanism allows for the production of concentrated urine, which is vital for conserving water in the body, especially in conditions of dehydration. 5. **Conclusion**: Therefore, the main function of the Loop of Henle is the reabsorption of water, which is crucial for the regulation of body fluids and the concentration of urine. ---
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