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50 Cards in this Set
- Front
- Back
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Functions of the nervous system |
Sensory imput Integration Process sensory imput Responde to stimui |
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Motor output activates what two things only |
Muscle or glands |
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What are the structural classification of the nervous system |
Central nervous system(CNS) Peripheral nervous system(PNS) |
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What are the parts of the CNS |
Brain and spinal cord |
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What are the parts of the PNS |
Spinal and cranial nerves |
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What are the classification of tye PNS |
Sensory (afferent) Motor (efferent) |
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What is the sensory division |
Nerve fibers carrying info to the CNS |
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What does the motor division do |
Carry impulses away from the CNS |
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What are the subdivisions of the efferent division |
Somatic- voluntary Autonomic- involuntary |
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What are support cells grouped together as |
Neurogila |
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What do support cells do |
Support, insulate , and protect neurons |
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What are the support cells |
Astrocytes Microglia Ependymal Olgiodendrocytes Satellite cell Schwann |
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Name the characteristics of an astrocytes |
-Abundant (Star shaped) -Brace neurons -Form barriers between capillaries and neurons -Control chemicla environment of the cell |
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What are characteristics of the Microgila |
Spider like phagocytes Dispose of debris |
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What are the characteristics of and ependymal cell |
Line cavities of the brain Circulate cerebrospinal fluid |
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What are characteristics if oligodendrocytes |
Wrap around nerve fibers in the CNS |
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What are characteristics if satellite cells |
Away from the cell nucleus Protect neuron cell bodies |
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Function of schwann cells |
Form myelin sheath in the PNS |
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What are the major regions of neurons |
Cell body Processes |
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What is a processe |
Fibers that extend from the cell body |
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Name the parts of the cell body |
Nissl substance Neurofibrills |
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What do neurofibrils do |
Intermediate cell shape Maintain cell shape |
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What are the processes outside the cell body |
Dendrites Axons |
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Where do dendrites conduct impulses to |
Towards the cell body |
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Where do axon conduct impulses to |
Away from the cell body |
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What do axons end in |
Axon terminals |
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What do axon terminals contain |
Vesicles with neurotransmitters |
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What are axon terminals separated from the next neuron by |
Synaptic cleft |
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What is a synapse |
Junction between nodes |
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Where are most neuron cell bodies |
The CNS |
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What is grey matter |
Cell bodies and unmyelinated fibers |
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What is a collection of cell bodies outside the CNS called |
Ganglia |
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What do sensory(afferent) neurons do |
-Carry impulses from the sensory receptors to the CNS -Cutaneous sense organs |
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What are functional classifacation of nerves |
Interneurons (association) Multipolar Bipolar Unipolar |
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Where are interneurons found |
Neutral pathways in the CNS |
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What is irratability |
Ability to responde to a stimuli |
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What is conductivity |
Ability to transmit an impulse |
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Is the plasma membrane at rest polarized or unpolarized |
Polarized |
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What causes depolarization and what does a depol. membrane allow |
A stimulus Na+ to flow through |
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What initiates an action potential |
The exchange of ions |
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What allows for repolarization |
Potassium rushes out of the neuron after sodium ions rush in |
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What is a reflex |
A rapid, predictable, and involuntary response to a stimuli |
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What are the pathways called that a reflex occurs over |
Pathway arcs |
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What is a reflex arc |
Direct route from a sensory neuron to and interneuron, to an effector |
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What are the types of reflexes |
Somatic Autonomic |
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What is an example of a 2- neuron reflex arc |
Petellar or knee jerk |
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What are examples of autonomic reflex |
Smooth muscle regulation Heart and blood pressure regulation Regulation of glands Digestive system regulation |
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What is a activation of a skeletal muscle in a reflex called |
Somatic reflex |
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What are the layers of the cerebrum |
Gray and white matter |
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What is the basel nuclei |
Islands of gray matter buried within white matter |
