BIO 208 Lecture Notes - Lecture 17: Somatic Nervous System, Autonomic Nervous System, Enteric Nervous System

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2 Jan 2018
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3: motor neurons carry aps from the cns to effector organs, effector organs, such as muscles or glands, respond to the aps. Cell bodies of somatic neurons are located in the cns. Their axons extend to skeletal muscles where they have an excitatory effect. Usually controlled consciously (voluntary: autonomic nervous system. Cell bodies of the preganglionic neurons are located in the cns. Their axons extend to ganglia where they synapse with postganglionic neurons. The postganglionic axons can have an excitatory or inhibitory effect on: smooth muscle, cardiac muscle, and glands. Enteric nervous system: sympathetic and parasympathetic divisions differ structurally in: Location of their preganglionic neuron cell bodies within the cns and their autonomic ganglia. Effects on organ systems: sympathetic nervous system. Seems to innervate everything except skeletal muscle. Inhibit some activities while excite others necessary for ght or ight . Major transmitters: norepinephrine and epinephrine (pre-ganglionic neurons- ach, some post-ganglionic also release ach: parasympathetic nervous system.

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