Hormone responsible for BP regulation after a fall due to blood loss

NEET PG
#1

Hormone responsible for BP regulation
after a fall due to blood loss.
a) ADH
b) ANP
c) Epinephrine
d) Aldosterone
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 -
  4. Antidiuretic hormone (ADH) : Increases water reabsorption in
    kidney.
  5. Angiotensin II: Causes vasoconstriction