Your hypothalamus detects increased blood osmolarity. It signals the pituitary gland to secrete ADH which inserts aquaporins into the descending loop of henle. This response would lead to lowering the osmolarity of blood. This type of response would be an example of:

OSMOREGULATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	Negative feedback
B	Positive feedback

Explanation:

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.

There is 1 question to complete.

AP BIOLOGY

ANIMAL PHYSIOLOGY

OSMOREGULATION