Combo Group Nervous System Chap 6
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Created by:
merkertffms on April 25, 2012
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Description:
This combines Section 1,2,3 of Chapter 6
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27 terms
Terms | Definitions |
|---|---|
 the cornea | the clear tissue that covers the front of the eye and protects the eye |
| the pupil | an opening in the eye which lets the light enter the eye |
| the iris | a circular structure that surrounds the pupil and regulates the amount of light entering the eye (comes in different colors) |
| the lens | a flexible structure that focuses the light |
| the retina | a layer of receptor cells that line the back of the eye |
| central nervous system | consists of brain and spinal cord |
| peripheral nervous system | nerves outside the central nervous system |
| brain | inside the skull and is part of the central nervous system that controls most of the body's functions |
| spinal cord | a thick column of nervous tissue that links the brain to most nerves in the peripheral nervous system |
| cerebrum | inputs the senses, controls movement and carries out complex mental processes |
| cerebellum | coordinates actions of your muscles and helps keep balance |
| brain stem | lies between the cerebellum and spinal cord it controls involuntary actions |
| somatic nervous system | control voluntary actions |
| autonomic nervous system | controls involuntary actions |
| reflex | a response that happens automatically |
| concussion | a bruise-like injury of the brain |
| stimulus | any change or signal in the environment that can make an organism react in some way |
| response | what the body does in reaction to stimulus |
| neuron | a cell that carries information through the nervous system |
| nerve Impulse | the message carried by a neuron |
| dendrite | a threadlike extension of a neuron that carries nerve impulses towards the cell body |
| axon | a threadlike extension of a neuron that carries nerve impulses away from the cell body |
| nerve | a bundle of nerve fibers |
| sensory neuron | a neuron that picks up stimuli from the internal or external environment and converts each stimulus into a nerve impulse |
| interneuron | a neuron that carries nerve impulses from one neuron to another |
| motor neuron | a neuron that sends an impulse to a muscle or gland, causing the muscle or gland to react |
| synapse | the junction where one neuron can transfer an impulse to the next structure |
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