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stimulates the reabsorption of water and...

_____ stimulates the reabsorption of water and electrolytes by DCT.

A

Vasopressin

B

Oxytocin

C

Prolactin

D

Estrogen

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Identify the Question**: The question asks which hormone stimulates the reabsorption of water and electrolytes by the Distal Convoluted Tubule (DCT) in the kidneys. 2. **Consider the Options**: The options provided are: - A) Vasopressin - B) Oxytocin - C) Prolactin - D) Estrogen 3. **Analyze Each Option**: - **Vasopressin (Antidiuretic Hormone)**: This hormone is secreted from the posterior pituitary gland and plays a crucial role in regulating water balance in the body. It increases the permeability of the DCT to water by promoting the translocation of aquaporins, which are channels that allow water to be reabsorbed. - **Oxytocin**: This hormone is primarily involved in uterine contractions during childbirth and milk ejection during breastfeeding. It does not have a significant role in water reabsorption in the kidneys. - **Prolactin**: This hormone is responsible for the development of mammary glands and milk production. It does not influence water and electrolyte reabsorption in the kidneys. - **Estrogen**: This hormone is involved in the regulation of the menstrual cycle and does not directly affect the reabsorption of water in the DCT. 4. **Conclusion**: Based on the analysis, vasopressin (ADH) is the hormone that stimulates the reabsorption of water and electrolytes by the DCT. It increases the permeability of the DCT to water, leading to concentrated urine. 5. **Final Answer**: The correct answer is **Vasopressin**. ---
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