Epinephrin and Internal secretion

Epinephrin noun - A catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action.

Internal secretion and epinephrin are semantically related. In some cases you can use "Internal secretion" instead a noun "Epinephrin".

Internal secretion noun - The secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect.

Epinephrin and internal secretion are semantically related. Sometimes you can replace term "Epinephrin" with "Internal secretion", this terms are similar.