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2670

Q: The rate of heartbeat is accelerated by the hormone

  • 1
    adrenaline
  • 2
    acetylcholine
  • 3
    thyroxine
  • 4
    pituitrin
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Answer : 1. "adrenaline"
Explanation :

Answer: A) adrenaline Explanation: 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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