Question

In case of the production of vasopressin, the stimulus is/are

• A. decrease in the water content in the body
• B. decrease in ionic concentration of the blood plasma
• C. increase in ionic concentration of blood plasma
• D. both a and c

Answer 1

The correct option is D both a and c

In case of the production of vasopressin, the stimuli are the decrease in the water content in the body and the increase in ionic concentration of blood plasma. Osmoreceptors in the hypothalamus sense these changes and stimulate the posterior pituitary gland to increase the secretion of vasopressin. This in turn increases the reabsorption of water by the kidneys.