Correct Answer - A
Ans. is 'a' i.e., ADH
(principles of medical physiology p. 573)
Blood pressure is regulated by following mechanisms.
Short term regulation
These mechanisms act immediately and correct the blood pressure
quickly.
These are :-
1. Baroreceptor reflex: Works during Bp range 70-150 mmHg
2. Chemoreceptor reflex - Works when Bp below 80 mmHg.
3. CNS ischemic response : This the only hope of survival when BP is below 40 mmHg.
Hormonal release : These are -
1. Antidiuretic hormone (ADH) : Increases water reabsorption in
kidney.
2. Angiotensin II: Causes vasoconstriction.
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