肾上腺素(E)是肾上腺髓质的主要激素,去甲肾上腺素(NE)是外周肾上腺素能神经冲动传递的主要介质。一般解释 E 和 NE 的作用是在效应器上有一种“受体(receptor)”。这种受体学说最早创始者 Ehrlich,经 Langley 在1905年应用于植物神经的药物,他认为:药物或神经末梢释放的介质与效应细胞上特殊受体或受点发生化学性的结合,通过 Epinephrine (E) is the major hormone of the adrenal medulla, and norepinephrine (NE) is the major mediator of peripheral adrenergic nerve impulse transmission. General Explanation The role of E and NE is to have a “receptor” on the effector. Ehrlich, the earliest founders of this receptor theory, applied to autonomic drugs by Langley in 1905, believes that the mediators released by the drug or nerve endings chemically interact with specific receptors or receptors on effector cells by