Q.

The receptors of which of the following hormones are located on the surface of the target cells?

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a

Progesterone

b

Thyroxine

c

Epinephrine

d

Aldosterone

answer is C.

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Detailed Solution

Water-soluble hormones (protein/peptide hormones and amine hormones, e.g., epinephrine) cannot diffuse into the cells through the lipid bilayer of the cell membrane.

Their receptors are located on the cell membrane of the target cells (membrane-bound receptors).  

Steroid hormones (e.g., oestrogen and aldosterone) and thyroid hormones are lipid-soluble and bind to intracellular receptors (nuclear receptors or cytoplasmic receptors).

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