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U3
APsych.
| Term | Definition |
|---|---|
| neuron | a nerve cell |
| dendrite | a neurons bushy, receives messages and conduct impulses towards the cell body |
| axon | the neuron extension; passes messages through its branches to other neurons or to muscles or glands |
| myelin sheath | enables vastly greater transmission speed as neural impulses hop from one sausage-like node to the next |
| action potential | a neural impulse; a brief electrical charge that travels down an axon |
| refactory period | a period of inactivity after a neuron has fired |
| resting potential | the electric potential across the plasma membrane of a neuron when it is in the nonexcited, or resting, state |