205textnotes20

205textnotes20 - 1. The preganglionic neurons are located...

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Unformatted text preview: 1. The preganglionic neurons are located in the CNS. 2. The postganglionic neurons (located in parasympathetic ganglia) are either close to or embedded in their targets. 3. The neurotransmitter between the preganglionic and the postganglionic neuron is Ach. The receptors on the postganglionic neurons are of the cholinergic nicotinic type. (Fig. 11-7) 4. The neurotransmitter secreted by the postganglionic neuron is Ach. The receptors on the target are of the muscarinic cholinergic type. (Table 11-1) 5. There is little divergence. The ratio (pre/post) = 1/3. 6. The limited divergence results in more specific cholinergic actions. Comparison of Sympathetic and Parasympathetic Branches (Table 11-3, 11-4, Figure 11-11)--------------------------------------------------------------------- B. The Somatic Motor System:--------------------------------------------------------------------- The somatic division includes: SENSORY NEURONS of DORSAL ROOTS and CRANIAL GANGLIA that innervate the skin, muscles, joints and...
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