NURS 364 Lecture Notes - Lecture 16: Central Nervous System, Neurotransmitter, Myosatellite Cell
14 Dec 2017
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Document Summary
To monitor changes occurring inside and outside the body (changes = stimuli) Process and interpret sensory input and decide if action is needed: motor output. Central nervous system: brain & spinal cord. Peripheral nervous system: nerve outside the brain and spinal cord. Structural classification of the nervous system: nervous tissue: neurons, neurons = nerve cells, cells specialized to transmit messages, major regions of neurons. Cell body nucleus and metabolic center of the cell. Processes fibers that extend from the cell body. Dendrites - carry impulses towards the cell. Axon - carry impulses away from the cell. Nervous tissue: neurons: most are found in the central nervous system, gray matter cell bodies and unmylenated fibers, nuclei clusters of cell bodies within the white matter of the central nervous system. Ganglia collections of cell bodies outside the central nervous system. Sensory (afferent) neurons: carry impulses from the sensory receptors, motor (efferent) neurons, carry impulses from the central nervous system, nervous tissue: neurons.
