Adrenergic nerve fibers and receptors are present within the cavernous trabeculae, plus they encompass the deep penile arteries. Noradrenaline is the major neurotransmitter that controls penile flaccidity and tumescence. [thirteen, fourteen] Sympathetic contraction is regarded as mediated by activation of postsynaptic alpha(1)-adrenergic receptors that improve intracellular calcium de... https://protesthetic-toys.com/