Question

The rate of heartbeat is accelerated by the hormone
A) adrenaline B) acetylcholine C) thyroxine D) pituitrin

Answer 1

Answer:

• The rate of heartbeat is accelerated by the hormone
• 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.

Answer 2

Answer:

thyroxin

Explanation:

thyroxin hormone is the answer