Non-synaptic chemical transmission continued ⊙ In noradrenergic neurons the varicosities are about Smooth muscle 5um, with upto20,000 ⊙o Intervaricose segment varicosities per neuron Varicosity Mitochondrion Transmitter is released at each varicosity One neuron innervate many effector cells Varicosity 了 Termina Fig. Ending of postganglionic autonomic neurons on smooth muscle• In noradrenergic neurons, the varicosities are about 5m, with up to 20,000 varicosities per neuron • Transmitter is released at each varicosity • One neuron innervate many effector cells. Fig. : Ending of postganglionic autonomic neurons on smooth muscle Non-synaptic chemical transmission continued