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Science Chapter 21 notes
notes
12
Science
7th Grade
11/14/2011

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Term
what does your nervous system do?
Definition
helps your body make adjustments to changes in your environment
Term
any change inside or outside your body that brings about a response
Definition
stimulus
Term
the regulation of steady conditions inside an organism
Definition
homeostasis
Term
what are neurons made of?
Definition
cell body, branches called dendrites and axons
Term
What do dendrites do?
Definition
receive messages and send them to the cell body
Term
What carries messages away from the cell body?
Definition
axons
Term
What are impulses?
Definition
messages carried by nerve cells
Term
What is the central nervous system made of?
Definition
brain and spinal cord
Term
the part of the brain that interprets impulses from the senses, stores memory, and controls movements
Definition
cerebrum
Term
Where does:
-Thinking take place
-largest part of the brain
-Outer layer is call cortex, which allows more complex thoughts to be processed
Definition
cerebrum
Term
the part of the brain located behind and under the cerebrum
Definition
cerebellum
Term
What does:
-interprets simuli from the eyses, earts, muscles, and tendons
-coordinates voluntary muscle movement, maintains muscle tones, and helps maintain balance
Definition
cerebellum
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