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in Biology by (45.1k points)

Assertion : Our body secretes adrenaline in intense cold.

Reason : Adrenaline raises metabolic late.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

1 Answer

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Best answer

Correct option (a) Both A and R are true and R is the correct explanation of A

Explanation :

Adrenaline is a catecholamine hormone, also known as epinephrine, secreted by the mammalian adrenal medulla as well as the adrenergic nerve endings. Its secretion is stimulated by the sympathetic nervous system under conditions of stress. Adrenaline stimulates blood flow to skeletal muscles and increases blood glucose levels. It also raises metabolic rate.

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