Q. The rate of heartbeat is accelerated by the harmone
A) acetylcholine
B) adrenaline
C) pituitrin
D) thyroxine
✔ Correct Answer: adrenaline
Exam Insight
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A) acetylcholine
B) adrenaline
C) pituitrin
D) thyroxine
✔ Correct Answer: adrenaline
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