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33 Cards in this Set
- Front
- Back
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consists of the brain and spinal cord.
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Central Nervous system (CNS)
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consists of nerves
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Peripheral nervous system (PNS)
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the cells that transmit nerve impulses between parts of the nervous system.
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neurons
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support and nourish neurons.
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neuroglia
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carry sensory information into brain and spinal cord
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sensory nerves
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carry motor information from CNS to effective
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motor nerves
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signals from skin, muscles, joints, special senses
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somatic sensory nerves
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signals from body organs
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visceral sensory nerves
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signals to skeletal muscles, voluntary
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somatic motor nerves
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signals to smooth muscle, cardiac muscle, glands, involuntary.
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autonomic motor nerves
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"fight or flight"
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sympathetic division
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"rest and digest"
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parasympathetic division
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takes nerve signals from a sensory receptor to the CNS.
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sensory neuron
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lies entirely within the CNS
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interneuron
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special structures that detect changes in the environment.
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sensory receptor
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carry motor information from CNS to effective
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motor nerves
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signals from skin, muscles, joints, special senses
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somatic sensory nerves
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signals from body organs
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visceral sensory nerves
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signals to skeletal muscles, voluntary
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somatic motor nerves
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signals to smooth muscle, cardiac muscle, glands, involuntary.
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autonomic motor nerves
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"fight or flight"
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sympathetic division
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"rest and digest"
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parasympathetic division
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takes nerve signals from a sensory receptor to the CNS.
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sensory neuron
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lies entirely within the CNS
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interneuron
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special structures that detect changes in the environment.
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sensory receptor
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takes nerve impulses away from the CNS to an effector.
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motor neuron
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carry out our responses to environmental changes, whether these are external or internal.
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effectors
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contains the nucleus, as well as other organelles.
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cell body
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short extensions that receive signals from sensory receptors or other neurons.
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dendrites
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the portion of a neuron that conducts nerve impulses.
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axon
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protective covering for axons
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myelin sheath
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gaps where there is no myelin sheath
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nodes of Ranvier
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convey information within the nervous system
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nerve signals
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