it is concluded that the bile salt stimulated both fluid secretion and intestinal contractions by activating a local nervous reflex mechanism consisting of a presynaptic cholinergic neuron and two postsynaptic neurons , one of which is cholinergic and innervates the intestinal smooth-muscle cell , and the other of which is noncholinergic and nonadrenergic and innervates the epithelium .
C0021853
intestinal
C1708547
intestinal smooth-muscle