The rate of heartbeat is accelerated by the hormone

A adrenaline
B acetylcholine
C thyroxine
D pituitrin

Correct Answer: adrenaline

The hormone adrenaline also called epinephrine is known as a stress hormone. In emotional upsets( like fear, anger etc.) this hormone is poured into the blood and it accelerates heart beat. The hormone acetylcholine decelerates heartbeat rate.

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A i ও ii
B i ও iii
C ii ও iii
D i, ii ও iii
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A parallels
B contains
C revolves
D escapes
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