But serotonin is active in many aspects of the body's physiology no? So just because it may not act on other classes of receptors, it still has wide ranging imp

But serotonin is active in many aspects of the body's physiology no? So just because it may not act on other classes of receptors, it still has wide ranging impacts. There are many kinds of SERT receptors, as they mentioned, Fk isn't all that selective about it