In the given mechanism of hormone action, the labels are A-Protein hormone, B-Receptor, C-Cyclic AMP Hormones which interact with membrane bound receptors do not enter the target cell. These bind with membrane proteins (receptors) and generate second messengers which in turn regulate cellular metabolism, e.g. FSH on ovarian cell membrane.
NEET UG 2019 — Zoology Chemical Coordination and Integration
2019mcqmedium
Identify A,B and C in the diagrammatic representation of the mechanism of hormone action. 
Select the correct option from the following
Official previous-year question
Held on 30 Apr 2019 · Verified 9 Jul 2026.
Options
- A
A-Steroid hormone; B-Hormone-receptor complex, C-Protein
- B
A-Protein hormone, B-Receptor; C-Cyclic AMP
- C
A-Steroid hormone; B-Receptor, C-Second messenger
- D
A-Protein hormone; B-Cyclic AMP, C-Homone-receptor complex
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