Zoology-Hormones
NEET Zoology Hormones MCQ Question
Type: MCQ-numerical-Easy-Class 11
If the adrenal medulla secretes catecholamines that increase the heart rate by 20%, and the normal heart rate is 75 beats per minute, what will be the new heart rate after secretion?
A
80 beats per minute
B
90 beats per minute
C
95 beats per minute
D
100 beats per minute
Correct Answer
Option C
Detailed Explanation
The normal heart rate is 75 beats per minute. A 20% increase is calculated as 0.20 * 75 = 15. Therefore, the new heart rate is 75 + 15 = 90 beats per minute.
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