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Nervous System
Nervous System Flash Cards
12
Science
7th Grade
02/08/2010

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Term
Stimulus
Definition
Any change inside or outside of your body
Term
What is the main "job" of your nervous system?
Definition
To maintain homeostasis (a balance, like not too hot or cold etc)
Term
Define Sensory Neuron
Definition
Recieves impuleses and sends messages to the brain
Term
Inter Neurons
Definition
Relays information from sensory neurons to motor neurons (Like reflexes or fast reactions)
Term
Define Motor Neuron
Definition
Sends impulses from the brain to the muscles
Term
What body parts make up the Central Nervous System
Definition
Brain and Spinal cord
Term
What body parts make up the Peripheral Nervous System 
Definition
All nerves BESIDES the brain and spinal cord
Term
Explain the somatic nervous system
Definition
Cranial and spinal nerves that go from the central nervous system to the skeletal muscles
Term
Explain the autonomic nervous system
Definition
Controls heartbeat, breathing, digestion and gland functions (all fo the automatic functions in your body)
Term
What is a reflex?
Definition
An automatic response to a stimulus that can not be controlled (the doctor tapping you knee with the rubber hammer)
Term
How do depressants effect the nervous system?
Definition
Slows down the central nervous system and impairs judgement, reasoning, memory and concentration
Term
How does caffene (energy drinks) effect the nervous system?
Definition
Speeds up the central nervous system.  Too much can result in restlessness, tremors (uncontrolable shaking) and insomnia.
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