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28/29/31
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12
Biology
10th Grade
05/09/2012

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Term
nervous system
Definition
physically connected network of cells tissues and organs that control movements and thoughts
Term
endocrine system
Definition
a collection on physically disconnected organs that helps to control growth development and responses to environment
Term
CNS
Definition
interprets messages from other nerves in the body and stores messages for later use
Term
PNS
Definition
a network of nerves that transmits messages to cns and from the cns to other organs in the body
Term
neuron
Definition
specialized cell that stores information
Term
dendrites
Definition
branchlike extensions off the cytoplasm
Term
axon
Definition
long extension that carries electrical messages away from the cell body
Term
resting potential
Definition
transmits an impulse
Term
Na-K pump
Definition
uses energy to transport sodium and bring potassium into the cell
Term
synapse
Definition
tiny gap between neurons
Term
terminal
Definition
part of axon through which the impulse leaves the neuron
Term
neurotransmitters
Definition
chemical signals of the nervous system
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