The hormones known as “catecholamines” (adrenaline, noradrenaline and dopamine) are not lipid soluble. Therefore their receptor sites are

Q. The hormones known as “catecholamines” (adrenaline, noradrenaline and dopamine) are not lipid soluble. Therefore their receptor sites are:

A.            On the inside of the plasma membrane.

B.            On the outside of the plasma membrane.

C.            In the cell cytoplasm.

D.            In the cell nucleus.

Answer: On the outside of the plasma membrane.