Term
| What is the Nervous System? |
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Definition
| System that controls your body and is responsible for communication between all parts |
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Term
Central Nervous System
aka CNS |
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Definition
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Term
Peripheral Nervous System
aka PNS |
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Definition
| all nerves outside the brain and spinal cord; connects CNS to rest of the body |
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Term
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Definition
nerve cell
basic unit of the nervous system
Function: neurons send chemical messages to other neurons (really quickly) |
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Term
| What are the parts of a neuron? |
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Definition
- Dendrites: get sensory information and send it into the cell body
- Axons: send this message to the next neuron
- (axon= away)
- Impulse: the message
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Term
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Definition
- neuorns DON'T touch
- Synapse= space between 2 neurons
- messages are transferred by chemical jumping across the gap
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Term
What are the types of Neurons?
3 types |
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Definition
Sensory Neurons
Interneurons
Motor Neurons |
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Term
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Definition
| recieve sensory info from environment and send it TO brain or spinal cord |
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Term
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Definition
| receive message from SN in brain and spinal cord, and decie what to do with the message (react? or not?) |
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Term
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Definition
| if a reaction is needed, these carry reaction message away from the brain towards muscles |
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Term
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Definition
anything that causes a response
Ex: Stimulus: stepping on nail
Response: jerk foot up
Ex: Stimulus: see bright light
Response: Squint Eyes |
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Term
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Definition
- Involuntary, automatic responses to stimuli
- controlled by the spinal cord
- leaving out the brain enables the body to react faster
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Term
| 3 Major Regions of the Brain: |
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Definition
Cerebrum
Cerebellum
Brainstem |
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Term
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Definition
- largest portion of the brain
- controls sensory perception, language, memory, emotions, and learning
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Term
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Definition
- coordinates movement
- controls balance
- controls muscle coordination
- everyday movements: eat, walk, talk, drink, write
- damage to this area may affect movement or coordination
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