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22 Cards in this Set
- Front
- Back
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What are the funtcions of the Nervous System>
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sensory input
integration motor input |
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What is sensory input
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monitoring stimuli
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What is integration
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interpretation of sensory input
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What is motor input
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response to stimuli
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What does the Central Nervous System consist of?
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Brain and Spinal Cord
Integration and command center |
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What does the PNS consist of?
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-Paired spinal and cranial nerves
-carries messages to and from the spinal cord and brain |
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What are the two functional divisions of the PNS?n
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Sensory division
Motor division |
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Sensory divsion is also know as what?
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afferent division
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Motor division is also known as what?
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efferent
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What does sensory afferent fibers do?
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carry impulses from skin, skeletal muscles, and joints to the brain
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what does visceral afferent fibers do?
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transmit impulses from visceral organs to the brain
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what does the motor (efferent) division do?
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transmits impulses from the CNS to effector organs
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What are the two main parts of the motor division?
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Somatic Nervous System and Autonomic nervous System (ANS)
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What does the somatic nervous system do?
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allows us to consciously control our skeletal muscles
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What does the ANS do?
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Regulated smooth muscle, cardiac muscle, and glands
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what are the two divisions of the ANS
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sympathetic and parasympathetic
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what are the two principal cell types of the nervous system?
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neurons and supporting cells
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Definintion of a neuron
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excitable cells that transmit electrical signals
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definition of a supporting cells
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cells that surround and wrap neurons
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What does a supporting cell NEUROGLIA do?
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provide a supportive scaffolding for neurons
-segregate and insulate neurons -guide young neurons to the proper connections -promote health and growth |
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T/F
Astrocytes are the most abundant, versatile, and highly branched glial cells |
TRUE
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what do astrocytes cling to?
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neurons and their synaptic endings, and cover capillaries
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