THORAX ABDOMEN AND PELVIS

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MEDICAL

KIDNEY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If you are dehydrated (low water potential in the blood), the body must conserve water. To do so, the brain triggers the pituitary gland to ____
A
release MORE ADH, making the collecting duct MORE permeable
B
release LESS ADH, making the collecting duct LESS permeable
C
release MORE ADH, making the collecting duct LESS permeable
D
release LESS ADH, making the collecting duct MORE permeable
Explanation: 

Detailed explanation-1: -When the body is low in water, the pituitary gland secretes vasopressin (also called antidiuretic hormone) into the bloodstream. Vasopressin stimulates the kidneys to conserve water and excrete less urine.

Detailed explanation-2: -It tells your kidneys how much water to conserve. ADH constantly regulates and balances the amount of water in your blood. Higher water concentration increases the volume and pressure of your blood. Osmotic sensors and baroreceptors work with ADH to maintain water metabolism.

Detailed explanation-3: -Higher concentrations of anti-diuretic hormone cause blood vessels to constrict (become narrower) and this increases blood pressure. A deficiency of body fluid (dehydration) can only be finally restored by increasing water intake.

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