KINESIOL 1Y03 Lecture Notes - Lecture 6: Central Nervous System, Peripheral Nervous System, Spinal Nerve

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A nerve cell is a neuron: cell body with nucleus, axon, can connect to other things. Sensory: sense changes through sensory receptors, gather information from environment (external and internal, send to cns decides what to do. Motor: respond to stimuli, go to muscles and glands. Skeletal, cardiac, smooth muscle (cannot control consciously) Integrative: analyze incoming sensory information, store some aspects, and make decisions regarding appropriate behaviours, determines if/what response is needed. Components: brain, spinal cord, nerves, sensory receptors. Subdivisions: central nervous system (cns): brain and spinal cord, peripheral nervous system (pns): sensory receptors and nerves. Sensory receptors: ending of neurons or separate, specialized cells that detect such things as temp, pain, etc. Ganglion: collection of neuron cell bodies outside cns in pns (ganglia plural) Plexus: extensive network of axons/neurons, and sometimes neuron cell bodies, located outside cns: enteric plexus in small intestine, works independent of cns.

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