Question

13 multiple choice 2 points what triggers the brain to increase the release of adh for water conservation by the kidneys? o osmoreceptors detect an increase in osmolarity in blood plasma. o baroreceptors detect an increase in blood pressure. o osmoreceptors detect a decrease in osmolarity in blood plasma. o chemoreceptors in the kidneys sense an increase in blood viscosity.

Explanation:

Osmoreceptors in the hypothalamus detect changes in blood - plasma osmolarity. When there is an increase in blood - plasma osmolarity (indicating dehydration), they signal the brain to release more antidiuretic hormone (ADH) to promote water reabsorption in the kidneys for water conservation. Baroreceptors are mainly involved in blood - pressure regulation, a decrease in plasma osmolarity would not trigger increased ADH release, and chemoreceptors in the kidneys sensing blood viscosity is not related to ADH release for water conservation.

Answer:

A. Osmoreceptors detect an increase in osmolarity in blood plasma.