Absorption of water in DCT is controlled by

Options

A. a) ADH
B. b) ACTH
C. c) Oxytocin
D. d) Insulin

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which hormone controls the absorption of water in the Distal Convoluted Tubule (DCT) of the nephron.

2. **Identifying DCT**: DCT stands for Distal Convoluted Tubule, which is a part of the nephron, the functional unit of the kidney responsible for filtering blood and forming urine.

3. **Evaluating the Options**:
- **Option A: ADH (Antidiuretic Hormone)**: This hormone is known to regulate water balance in the body. It promotes water reabsorption in the kidneys, specifically in the DCT and collecting ducts.
- **Option B: ACTH (Adrenocorticotropic Hormone)**: This hormone stimulates the adrenal glands to produce cortisol but does not play a role in water absorption in the DCT.
- **Option C: Oxytocin**: This hormone is primarily involved in childbirth and lactation, with no role in water absorption in the DCT.
- **Option D: Insulin**: This hormone regulates blood glucose levels and does not influence water absorption in the DCT.

4. **Conclusion**: Based on the evaluation, the hormone responsible for the absorption of water in the DCT is **ADH (Antidiuretic Hormone)**.

5. **Final Answer**: Therefore, the correct answer is **Option A: ADH**.

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