Zoology-Hormones
NEET Zoology Hormones MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which of the following combinations correctly describe the functions and effects of catecholamines?
A
Catecholamines increase heart rate, pupil dilation, and glucose breakdown.
B
Catecholamines are secreted during periods of relaxation and calmness.
C
Catecholamines decrease alertness and respiratory rate.
D
Catecholamines play a role in increasing body temperature and food digestion.
Correct Answer
Option A
Detailed Explanation
Catecholamines, such as adrenaline and noradrenaline, are secreted in response to stress and are known to increase heart rate, pupil dilation, and stimulate the breakdown of glycogen, thereby raising blood glucose levels, consistent with the concept of 'Fight or Flight'.
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