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Heartbeat increases at the time of interview because of

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Heartbeat increases at the time of interview because of 

(a) renin

(b) rennin

(c) adrenaline

(d) Diuretic ADH

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(c) adrenaline

Explanation:

Adrenaline (amine hormone) is secreted by adrenal medulla on stimulation of sympathetic nervous system for meeting an emergency or stress condition like fear injury accident etc. Hence, it also called as emergency hormone. It increases blood pressure, respiration rate, sugar level in blood etc. It prepares the body to face stress at the time of interview by increasing heart beat. So it is also called stress hormone. Renin is proteolytic enzyme synthesized, stored, and secreted by the juxtaglomerular cells of the kidney. It plays a role in regulation of blood pressure by catalyzing the conversion of angiotensinogen to angiotensin I and II which in turn stimulates the release aldosterone from adrenal gland. Rennin, a coagulating enzyme produced from the stomach of human body,  catalyzes the coagulation of milk by converting milk protein, caesin into paracaesinate. ADH (antidiuretic hormone) is secreted by the posterior portion of the pituitary gland that constricts blood vessels raises blood pressure, and reduces excretion of urine.

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