Zoology-Hormones
NEET Zoology Hormones MCQ Question
Type: MCQ-numerical-Hard-Class 11
If a sudden stress situation occurs, which hormone is primarily responsible for the increase in heart rate and what is the approximate percentage increase in heart rate if the resting heart rate is 70 beats per minute and the increase is known to be 20%?
A
Adrenaline, 84 beats per minute
B
Noradrenaline, 84 beats per minute
C
Adrenaline, 94 beats per minute
D
Noradrenaline, 94 beats per minute
Correct Answer
Option A
Detailed Explanation
Adrenaline, secreted by the adrenal medulla, is known as the emergency hormone and is responsible for increasing heart rate. A 20% increase from a resting rate of 70 bpm is 84 bpm.
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