_______ accelerates heart by stimulating adrenal medulla through the sympathetic nerves.

Adrenaline

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Vasopressin

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Thyroxine

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Collip's hormone

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Solution

The correct option is B Adrenaline
Sympathetic nervous system is a part of autonomous nervous system and releases adrenaline. Adrenaline, also known as epinephrine, is secreted from adrenal medulla in response to stress conditions in the body. Whenever homeostasis of body is disturbed, adrenaline is released which increase alertness, piloerection, increase in heart beat and strength of heart contraction. These reactions are considered as fight or flight reactions induced by adrenaline.
So, the correct answer is 'Adrenaline'.

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Similar questions

Name the following :

(a) The three hormones produced by pancreas.

(b) The hormone produced by adrenal medulla.

(d) The hormone secreted by β (beta) cells of the islets of Langerhans.

(e) The hormone which increases blood pressure.

(f) The hormone causing more urine formation.

(g) The hormone which stimulates the entire sympathetic nervous system.

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