HTHSCI 1H06 Lecture Notes - Lecture 5: Bronchiole, Parasympathetic Ganglion, Gastrointestinal Physiology
5 Oct 2017
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Document Summary
The branch of your nervous system that controls your involuntary muscles like the heart and smooth muscles. for this reason it is sometimes called the visceral motor nervous system. There is also a sensory part (made of visceral afferent nerves) of the system but it is. The most important role of the ans is to maintain homeostasis of things like blood largely ignored except in regard to referred pain and interoceptors pressure. Most visceral organs have both types of visceral motor input and the effect on the organs is predictable. This is, of course, an appropriate response for rest and relaxation. Input from one branch of the ans is dominant in an organ. In the heart there are both branches of the autonomic nervous system but the sympathetic nervous system is dominated by the parasympathetic nervous system. In the gi tract the parasympathetic nervous system dominates over the sympathetic system for regulating gastrointestinal motility.
