Thirst is controlled by:
Correct answer: A. Pituitary gland
- A. Pituitary gland
- B. Adrenal gland
- C. Parathyroid
- D. Thyroid
Explanation
The pituitary gland, specifically through the release of antidiuretic hormone (ADH), plays a crucial role in managing the body's water balance. When hydration levels are low, the pituitary gland secretes ADH to retain water by concentrating urine. This mechanism helps control thirst by signaling the body to conserve water. The adrenal gland, although important for stress and metabolism, does not control thirst. Similarly, the parathyroid glands manage calcium levels, and the thyroid gland regulates metabolism, neither of which are directly involved in thirst regulation.
This question appeared on the ETEA MDCAT 2012 paper, which you can sit online with every answer explained.
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Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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