KAAP309 Study Guide - Midterm Guide: Autonomic Nervous System, Preganglionic Nerve Fibers, Postganglionic Nerve Fibers

• School: University of Delaware
• Department: Kinesiology & Appl Physiology
• Course: KAAP309
• Professor: Rose William

Document Summary

Autonomic nervous system somatic nervous system: cardiac muscles. Smooth muscles: glands, 2-neuron chain indirectly. Skeletal muscles. reach activation sites: 1st neuron in chain: preganglionic neuron whose cell body resides in cns. Characteristics: cell bodies located in cns, axons extend in spinal or cranial nerves directly reach activation sites. Thick: heavily myelinated, group a, conduct nerve impulses rapidly. Effects: release, release, acetylcholine (ach) via parasympathetic fibers, norepinephrine (ne, ach at synapses with skeletal muscle fibers, excitatory effects: stimulus > threshold muscle contraction. via sympathetic fibers. Excitatory or inhibitory effects: determined by receptors on target organ. Overlapping: higher brain centers coordinate/regulate motor activities. Spinal somatic nerves: autonomic fibers, somatic fibers, many adaptations to stimuli require effort from both systems, somatic skeletal muscles, autonomic visceral organs. Rest-and-digest system: craniospinal division, keeping body energy as low as possible. Sleep: rest, digesting food, removing waste: feces & urine, regulating hr & bp at low levels, constricting pupils, accommodating lenses to focus on nearby objects.