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Question

Heart beat increases at the time of interview because of

A
Renin
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B
Thyroxine
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C
Adrenaline
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D
ADH
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Solution

The correct option is A Adrenaline
Adrenaline 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 an emergency hormone. It increases blood pressure, respiration rate, the 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 as the stress hormone.
Renin is proteolytic enzyme synthesized, stored and secreted by the juxtaglomerular cells of the kidney. It plays a role in the regulation of blood pressure by catalyzing the conversion of angiotensinogen to angiotensin I and II, which in turn stimulates the release aldosterone from the adrenal gland.
Rennin, a coagulating enzyme produced from the stomach of the human body, catalyzes the coagulation of milk by converting milk protein, casein 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. Hence, option C is correct.

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