PSL301H1 Study Guide - Midterm Guide: Axon Terminal, Neurodegeneration, Fourth Ventricle
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PSL301H1 Full Course Notes
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Document Summary
The central nervous system (cns) is comprised of the brain and the spinal cord: all of the neural networks lying outside of the cns are components of the peripheral nervous system (pns). The pns has two major subdivisions: the somatic nervous system (sns) and the autonomic nervous system (ans). The somatic nervous system comprises the neural networks involved in voluntary action via skeletal muscle. The autonomic nervous system controls visceral, largely unconscious, bodily functions. Some of these functions include: heartbeat, digestion, urination, respiration, reflexes, etc. The autonomic nervous system has three subdivisions: sympathetic nervous system, parasympathetic nervous system, and the enteric nervous system. The sympathetic nervous system general function is to initiate the body"s flight-or-fight response or a more general stress response. The parasympathetic division of the ans is involved in mediating the feed-and-breed and. The two systems are generally thought of as being antagonistic to one another.
