Q133 / 180 · NEET 2019 (Odisha) · Zoology

Identify $A, B$ and $C$ in the diagrammatic representation of the mechanism of hormone action. Figure
Select the correct option from the following

  • A
    A-Steroid hormone; $B$-Hormone-receptor complex, C-Protein
  • Correct answer
    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

Solution

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.

Hence, the correct answer is option: 'B'.

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