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34 Cards in this Set
- Front
- Back
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Information processing center
Includes brain and spinal cord |
Central Nervous system(CNS)
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collects info from sensory receptors and brings it to the CNS
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Affervent division of PNS
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transmits motor commands to muscular glands
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effervent division of PNS
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Functional division
involuntary activates smooth cardiac muscle control centers within the CNS Peripheral components-sympathetic and parasympathetic |
autonomic nervous system
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functional division of nervous system
activates skeletal muscle cells voluntarily or involuntarily |
Somatic nervous system
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info transfer and processing thru 5 cell structures
1 of 2 cell types |
neuron
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neuron structure
receptor |
dendrite
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neuron structure
contains nucleus and organelles of neuron |
cell body
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neuron structure
conducts nerve impulse |
axon
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neuron structure
axon branches-ends |
Teleodendria
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neuron structure
end of teleodendria, release neurotransmitters that affect other neurons, muxcles or glands |
synaptic terminals
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what is the order in which the info is processed thru the structures of the neuron?
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1-dendrites
2-cell body 3-axon 4-teleodendria 5-synaptic terminal |
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cells that support functioning of CNS and PNS.
1 of 2 cell types |
neuroglia or glial cells
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cell of CNS
-phagotic cell that engulfs foreign substance(Bacteria) |
microglia
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cell of CNS
-epitheleal cells that form passageways for the flow of cerebral spinal fluid |
ependymal
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cell of CNS
-form the repairs and develop nerve tissue |
astrocyte
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cell of CNS
-wrap CNS axons with protein |
oligodendrocytes
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cell of PNS
-a clustered arrangement of neurons |
ganglia
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cell of PNS
-a clustered arrangement of neurons |
ganglia
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cell of PNS
-cells that enclose the neuron cell bodies in the ganglia |
satellites
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cell of PNS
-surround myelinated or unmyelinated neural axons to increase rate of nerve impulse transmission |
schwann
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cellular region
-identified by presence of myelinated axons |
white matter
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cellular region
-identified by presence of unmyelinated axons,dendrites, and cell bodies |
gray matter
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properties of neurons
1-highly responsive to stimuli- 2-produces traveling electrical signals measured in microvolt action potentials 3-_________of neurotransmitters |
1-excitability
2-conductivity 3-secretion |
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rate of conductivity depends on
1-presence of___________ 2-diameter of___________ |
1-myelin sheaths
2-axon |
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class of neurons
in PNS send stimuli from receptor in senses to CNS |
sensory(afferent)neuron
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class of neuron
-in brain and spinal cord -lie between sensory and motor pathways -90% of total neurons -process, store and retreive info |
interneurons
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class of neuron
sends response to effectors(muscle and gland cells) |
motor(efferent)neuron
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site of connection/communication between the terminal end of a neuron and another cell
-neuron but if muscle neuromuscular junction |
synapse
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physical gap or space of the synapse
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synaptic cell
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neuron that sends the impulse into the cleft
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presynaptic neuron
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1-terninal end of presynaptic neuron
2-organelles that store neurotransmitters in the presynaptic neuron |
1-synaptic terminal
2-synaptic vessels |
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neuron with receptors that captures the signal from cleft and transmits it onward
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postsynaptic neuron
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-monitoring orientation and internal vs.external environment
-coordination and conrol of bodily activities -memory,learning,intelligence -programming of instinctual behaviors |
Functions of the nervous system
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