Loop of Henle in mammals helps in formation of

Options

A. dilute urine
B. uric acid
C. concentrated urine
D. urea

Answer

To answer the question, "Loop of Henle in mammals helps in formation of what?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Loop of Henle**:
- The Loop of Henle is a U-shaped portion of the nephron, which is the functional unit of the kidney. It plays a crucial role in the concentration of urine.

2. **Function of the Loop of Henle**:
- The primary function of the Loop of Henle is to facilitate the reabsorption of water and sodium chloride from the filtrate (the fluid that passes through the nephron).

3. **Mechanism of Concentration**:
- As the filtrate moves down the descending limb of the Loop of Henle, water is reabsorbed into the surrounding tissue, making the filtrate more concentrated.
- In the ascending limb, sodium chloride is actively transported out, further contributing to the concentration gradient in the medulla of the kidney.

4. **Resulting Urine Concentration**:
- Due to the reabsorption processes occurring in the Loop of Henle, the urine produced is more concentrated than the blood plasma. This is essential for the body to conserve water, especially in mammals that live in arid environments.

5. **Eliminating Incorrect Options**:
- The options given were dilute urine, uric acid, concentrated urine, and urea.
- Since the Loop of Henle is responsible for concentrating urine, the correct answer must be "concentrated urine".

### Final Answer:
The Loop of Henle in mammals helps in the formation of **concentrated urine**.

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