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24 Cards in this Set
- Front
- Back
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nervous system is made up of mostly ...........
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nervous tissue
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2 types of nervous tissue cells
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neurons and gial
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nerve cells =
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neurons
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function is to conduct electrical impulses to and
from nervous system |
neurons
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2 classifications of neurons
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afferent and efferent
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sensory =
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afferent
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motor =
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efferent
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supportive cells that form a connective tissue component in nervous system; one type of nervous tissue
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glial
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fatty white material created when a glial or many glial cells surround a portion of neuron to provide support
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myelin
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surrounds the neuron's nucleus and contains important cellular materials vital to the longevity of the neuron.
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cytoplasm
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2 arm-like processes which extend from cell body of neurons
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dendrites, axons
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look like tree branches and function as receptors for signals and conduct electrical signals towards the nerve cell body.
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dendrites
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are thin, chain-like extensions with a uniform appearance. They are the impulse generators and conductors that transmit nerve impulses away from the nerve cell body
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axons
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nerve fibers =
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axons
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cells that surround each axon within a nerve
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Schwann cells
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groups of axons grouped into bundles - these bundles are called
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nerve fascicles
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a tough fibrous sheath which surround the whole nerve
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epineurium
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most nerves composed of both motor and sensory neurons are called...
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mixed nerves
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what are these kind of nereves called - specifically some of the cranial nerves, are composed of either sensory neurons only (sensory nerves) or motor neurons only (motor nerves).
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specialized nerves
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site at which neurons communicate or transmit electrical impulses
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synapse
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cell junction (intersection) in which one neuron transmits its signal to another
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synapse
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how many pairs of spinal nerves arise laterally from the spinal cord and externally through the foramina of the vertebral column.
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31
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mixed nerves that supply peripheral body parts with both sensory and motor innervation (nervous energy or stimulation) care called....
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spinal nerves
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an opening, orifice, or short passage, as in a bone; plural of foramen
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foramina
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