PHY2042 Study Guide - Final Guide: Peripheral Nervous System, Skeletal Muscle, Sensory Nerve
19 Oct 2018
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The mammalian nervous system can be divided as follows: Here, the cns will be mentioned only insofar as it influences the autonomic nervous system (ans). Peripheral sensory neurons transmit information from the environment and from organs of the body to the cns. The cell bodies of these neurons lie outside the cns in the dorsal root ganglia. The axons run, without discontinuity, from their receptive endings to the cns, where they provide information to the somatic motor and visceral nervous systems, as well as to centres in the brain. 1. 3 somatic nervous system: vascular effectors vascular effectors. The cell bodies of the somatic motor nerves are located in the ventral horn of the spinal cord, and are thus within the cns. Healthy skeletal muscles are relaxed in the absence of activity. Activity in the somatic motor nerves causes the release of a single chemical, acetylcholine, from the terminal within the muscle.
