Term
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Definition
Control center
Stimulates movement
Maintains homeostasis (with endocrine system) |
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Term
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Definition
Neurons traveling together, 45 miles of them
Groups of axons |
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Term
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Definition
| Conducts electricity to send messages |
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Term
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Definition
Glue other neurons together
takes care of other neurons
feeds and protects neurons
50 glial cells to each neuron |
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Term
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Definition
Afferent (arrives)
Temperature
Light
Pressure
Special Senses |
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Term
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Definition
(association)
Entirely CNS
99% all neurons
Connect Afferent and Efferent neurons |
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Term
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Definition
| Ability to respond electrically to stimuli |
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Term
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Definition
| Pass electrical signals through plasma membrane |
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Term
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Definition
| Secrete Neurotransmitters that stimulate the adjacent cell |
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Term
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Definition
Efferent exit
Connect CNS to effector organs
Muscle
Glands |
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Term
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Definition
Star shaped
Brace neurons
Form barrier (b-b) between capillaries and neurons
Control the chemical environment of the brain
Supply glucose to neuron
Secrete nerve growth factors promoting neuron growth (after stroke)
Clean up neurotransmitters and K ions from tissue fluid
Cover entire brain surface in the gray matter of the CNS
(kings taster) |
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Term
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Definition
Produce myelin sheath around nerve in the CNS
Have up to 15 arms |
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Term
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Definition
| Form myelin sheath in the peripheral nervous system |
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Term
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Definition
| Gaps in myelin sheath along axon |
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Term
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Definition
The clean up crew
Spider like phagocytes
Dispose of debris
Concentrated in areas of damage or stroke |
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Term
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Definition
Lines cavity of brain and spinal cord
Produces and circulates the cerebral spinal fluid |
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Term
| cerebral spinal fluid CSF |
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Definition
| Fluid brain and spinal cord are bathed in. |
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Term
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Definition
Surround cell bodies
Not much known
Regulate chemical environment?
Provide electrical insulation? |
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Term
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Definition
| Found mostly in brain (retina, adrenal medulla)looks like sun with rays all around |
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Term
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Definition
Olefactory
one axon and dendrite at each end |
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Term
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Definition
Carries sensory signals to the spinal cord
cell body attached to axon |
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Term
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Definition
Brain and spinal cord
look like tree |
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Term
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Definition
| An insulating layer around a nerve fiber. |
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Term
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Definition
| Meeting point between neuron and any other cell. |
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Term
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Definition
| A change in charge that travels as a wave along the membrane of a neuron. |
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Term
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Definition
Sodium is in large concentration along the outside of the cell membrane.
Potassium ion are in large concentrations along the inside of the cell membrane.
Inside the cell is predominantly negative. |
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Term
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Definition
Change in the membrane permeability to potassium = open
Charge flows= current |
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Term
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Definition
Depolarization
Allows sodium to flow into cell
The exchange of ions initiates and action potential in the neuron |
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Term
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Definition
Repolarization - returns to negative potential
Potassium ions rush out and sodium ions rush in
The sodium - potassium pump restores original configuration |
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Term
| NERVE IMPULSE PROPAGATION |
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Definition
| The nerve impulse continues to move away from the cell |
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Term
CONTINUATION OF THE NERVE IMPULSE
between two neuron |
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Definition
Impulses are able to cross the synapse to another nerve
Neurotransmitter is released from a nerves axon terminal
The dendrite of next neuron has receptors that are stimulated by the neurotransmitter |
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Term
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Definition
Vesicle fuses with plasma membrane
Neurotransmitter is released into synaptic cleft
Neurotransmitter binds to receptor on receiving neurons membrane |
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