2. Non-synaptic chemical transmission ° Sympathetic Nerve The postganglionic °2 Smooth neurons innervate the muscle smooth muscles Intervaricose Axon segment No recognizable endplates Varicosity Mitochondrion or other postsynaptIc specializations The multiple branches are beaded with enlargements Varicosity (varicosities) that are not covered by schwann cells Terminal o and contain synaptic Fig. Ending of postganglionic vesicles autonomic neurons on smooth muscle2. Non-synaptic chemical transmission • Sympathetic Nerve • The postganglionic neurons innervate the smooth muscles. • No recognizable endplates or other postsynaptic specializations; • The multiple branches are beaded with enlargements (varicosities) that are not covered by Schwann cells and contain synaptic vesicles Fig. : Ending of postganglionic autonomic neurons on smooth muscle