Hormone receptors are always located on the cell membrane.

a. True

b. False

b. False

Explanation:

Endocrine glands always release hormones in the blood (or hemolymph) because they reach every cell in the body. Each hormone acts only on certain cell types, called target cells. Target cells of a given hormone have, in the membrane or cytoplasm, proteins called hormone receptors, capable of combining specifically with hormone molecules. It is only when the right combination occurs that the target cells exhibit the characteristic response of hormonal action.