Zoology-Hormone Action Mechanism
NEET Zoology Hormone Action Mechanism MCQ Question
Type: MCQ-fact-Hard-Class 11
Which type of hormones primarily act by generating second messengers after binding to membrane-bound receptors?
A
Peptide and polypeptide hormones
B
Steroid hormones
C
Amino-acid derivatives
D
Iodothyronines
Correct Answer
Option A
Detailed Explanation
Peptide and polypeptide hormones, such as insulin and glucagon, interact with membrane-bound receptors and do not enter the target cell but generate second messengers like cyclic AMP, which regulate cellular metabolism.
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