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20 Cards in this Set
- Front
- Back
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nervous system
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master controlling and communicating system
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integration
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interprets sensory input and makes decisions about what should be done at each moment
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Central nervous system
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consists of brain and spinal cord
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peripheral nervous system
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outside brain and spinal cord, communication lines
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motor division
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carries impulses from CNS to effector organs
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somatic nervous system
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allows us to consciously control our skeletal muscles
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autonomic nervous system
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regulates involuntary muscles
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neuroglia
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types of cells that generally support, insulate, protect neurons
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ependymal
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line cavities of brain and spinal cord
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neurons
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transmits messages throughout body
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synaptic cleft
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separation between terminals
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myelin
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protects and insulates fibers
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schwaan cells
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cells that wrap themselves in jellyrolled fashion
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nodes of ranvier
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gaps between schwann cells
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gray matter
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contains mostly unmyelinated fibers and cell bodies
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sensory neurons
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neurons carrying impulses from sensory receptors
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bipolar neurons
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neurons with an axon and a dendrite
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polarized
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fewer positive ions sitting on the inner face of the neurons plasma membrane
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action potential
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nerve impulse
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reflexes
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rapid, predictable, involuntary responses to stimuli
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