BIOL 246 Study Guide - Midterm Guide: Autonomic Ganglion, Cardiac Muscle, Motor System

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Table 9. 1 | comparison of the somatic motor system and the autonomic motor. Cell bodies of postganglionic autonomic fibers located in paravertebral, prevertebral (collateral), and terminal ganglia. No specialization of postsynaptic membrane; all areas of smooth muscle cells contain receptor proteins for neurotransmitters. Slow-conducting; preganglionic fibers lightly myelinated but thin (3 m); postganglionic fibers unmyelinated and very thin (about 1. 0. Which are myelinated/unmyelinated: effectors of sympathetic nerves, eye, head and neck, heart and lungs, effectors of parasympathetic nerves. Spinal origin of preganglionic fibers origin of postganglionic fibers. Eye (smooth muscle in iris and ciliary body) S2 to s4 (sacral: sympathetic nerve fibers. Include celiac, superior mesenteric, and inferior mesenteric ganglia. Increased sensitivity of smooth muscles to neural stimulation after their innervation has been blocked or removed for a period of time: observed in autonomic motor system. Inner part of the adrenal gland: secretes hormone epinephrine (adrenaline) and norepinephrine to a lesser degree when stimulated by sympathetic system.

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