Chapter 8: The Nervous System--8.2
About this set
Created by:
karebear426 on April 29, 2010
Subjects:
Biology God's Living Creation Abeka book
Description:
Dr. Durrand
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9 terms
Terms | Definitions |
|---|---|
 Schwann cells | axons that extend from the nerve cell bodies in peripheral nerves are surrounded by special cells |
| multiple sclerosis | disease of the brain and spinal cord; occurs when the bodies immune systems attacks the glial cells that provide myelin sheaths for the nerve cell axons |
| paralysis | inability of the muscles to move |
| action potential | neuron is triggered to fire, a brief pulse of positive charge sweeps through the neuron and races down the axon |
| synapse | where does the axons of sensory neurons and interneurons usually end |
| neurotransmitter | when the action potential reaches the synapse it releases a chemical into the synapse |
| Parkinson's disease | affects the patients control of posture and movement; its characterized by tremors and stiffness of the limbs |
| reflex | simplest act of the nervous system |
| reflex arc | simplest nerve pathway which may involve as few as two or three nerve cells |
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