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11 Cards in this Set
- Front
- Back
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What is the central nervous system |
The main part of the nervous system. Contains the brain and spinal cord |
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What is the nervous system |
An organ system that carries impulses around the body |
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Define the term- stimuli |
Change in enviroment. Anything your body is sensitive to |
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What are sense organs (give example) |
Receptor cells that detect stimuli E.g: eyes, ears skin |
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Skin contain receptor cells that detect the stimulus of... |
Temperature change |
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Name two features of neurones |
Cell body & long extension to carry impulses |
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What are dendrites |
Tiny branches on neurones that recieve impulsew from the receptor cell |
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What is an axon |
Long extension in a neurone, carries impulses towards the other neurones |
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What is a dendron |
Long extension in a neurone, carries impulses toward the axon |
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What is an axon terminal |
Small button at the end of the branches, that leaves the axon |
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Define the term- myelin sheath |
Farty layer surrounding the axon, electrically insulates each neurone stop signal loss and speeding up neurotransmission |
