Ascending limb of Henle’s loop is ____________to water whereas the descending limb is___________to it.

Explanation

To answer the question, we need to understand the characteristics of the ascending and descending limbs of Henle's loop in the nephron.

1. **Understanding the Structure**: The nephron is the functional and structural unit of the kidney, and it consists of various parts, including the loop of Henle, which has two limbs: the ascending limb and the descending limb.

2. **Function of the Ascending Limb**: The ascending limb of Henle's loop is primarily involved in the reabsorption of ions (like sodium and chloride) but is impermeable to water. This means that water cannot pass through this part of the nephron.

3. **Function of the Descending Limb**: In contrast, the descending limb of Henle's loop is permeable to water. This allows water to be reabsorbed back into the bloodstream while the electrolytes remain in the tubular fluid.

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