Term
| what are the parts of the central nervous system |
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Definition
| the brain and spinal cord |
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Term
| what are the parts of the peripheral system |
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Definition
| the parts outside of the CNS. mainly the nerves of the spinal cord and brain |
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Term
| what is a myelin and where does it come from? |
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Definition
| a whitish fatty material that covers the long nerve fibers. it comes from the schwann cells |
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Term
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Definition
| carry impulses from the sensory receptors. cutaneous sense organs which are similar types of sensory receptors seen in the skin |
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Term
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Definition
| carry impulses from the central nervous s ystem |
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Term
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Definition
| connect sensory and motor neurons. found in neural pathways in central nervous system |
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Term
| what is action potential? |
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Definition
| the echange of ions initiates an action potential in the neuron. if the action potential starts it is propgated over the entire axon potassium ions rush out of the neuron after sodium ions rush in, which repolarizes the membrane. a depolarized membrane allows sodium to flow inside the membrane |
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Term
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Definition
| synapse is the junction between enurons. the events are the action potential depolrizes the membrane, opens up calcium channel, neurotransmitter comees out and fuse with membrane. release neutransmitter synapse by a diffusion. bind with protein receptor. neutransmitter is reabosrbed |
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Term
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Definition
| direct route from a sensory neuron to an interneuron to an effector. there are 2 types automatic and somatic. changes in the size of pupils are automomic. somatic stimulates skeletal muscles. |
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Term
| what are the parts of the brain stem |
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Definition
"lower brain"
-medulla oblongata
-pons
-midbrain
functions are homeostasis, coordination of movement and conduction of impulses to higher |
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Term
| what are the four major parts of the brain |
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Definition
| cerebrum, hempispheres, diencephaion, brain stem and cerebellum |
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Term
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Definition
| ridges and grooves which make up the surface of the cerebrum |
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