ANIMAL PHYSIOLOGY
OSMOREGULATION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -ADH is stored in neurons within the hypothalamus. These neurons express osmoreceptors that are exquisitely responsive to blood osmolarity and respond to changes as little as two mOsm/L. [2] Therefore, slight elevations in osmolarity result in the secretion of ADH.
Detailed explanation-2: -Antidiuretic hormone (ADH, or vasopressin): ADH helps regulate the water balance in your body by controlling the amount of water your kidneys reabsorb while they’re filtering wastes out of your blood.
Detailed explanation-3: -Answer and Explanation: The correct answer is C (water reabsorption increases at the collecting duct). ADH causes channels in the collecting duct to open leading to reabsorption of water back into the blood.
Detailed explanation-4: -Increased blood osmolarity, sensed by osmoreceptors within the hypothalamus, activates release of vasopressin (also called antidiuretic hormone [ADH]) from the posterior pituitary.