When is antidiuretic hormone secreted?

Answer 1

When osmolarity increases above the threshold, the ever-alert osmoreceptors recognize this a the cue to stimulate the neurons that secrete antidiuretic hormone. Secretion of antidiuretic hormone is also simulated by decreases in blood pressure and volume, conditions sensed by stretch receptors in the heart and large arteries. Changes in blood pressure and volume are not nearly as sensitive a stimulator as increased osmolarity, but are nonetheless potent in severe conditions. For example, Loss of 15 or 20% of blood volume by hemorrhage results in massive secretion of antidiuretic hormone. Another potent stimulus of antidiuretic hormone is nausea and vomiting, both of which are controlled by regions in the brain with links to the hypothalamus.

Answer 2

When ever there is less water available to drink or there is increased loss of water from the body. The later may be due to diarrhoea or the heavy perspiration in hot climate of the tropical areas.

Answer 3

Antidiuretic hormone (ADH) is typically secreted by the pituitary gland in response to high blood osmolality or low blood volume. It helps regulate water reabsorption in the kidneys, reducing urine production to maintain body fluid balance.

Answer 4

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Answer 5

posterior pituitary gland