| A | B |
|---|
| neuron | cell of the nervous system that transmits impulses between the body systems as well as interprets and stores some messages in the brain |
| dendrite | branchlike extension of a neuron that receives impulses from neighboring neurons |
| axon | long extension of the neuron membrane that carries impulses from one neuron to another |
| resting potential | difference in electrical charge between the inside and outside of a neuron; contains the potential energy needed to transmit the impulse |
| sodium-potassium pump | active transport protein in neurons that carries sodium (Na+) ions out of the cell and bring potassium (K+) ions into the cell |
| action potential | fast, moving change in electrical charge across a neuron's membrane; also called an impulse |
| synapse | tiny gap between neurons through which chemical signals are sent |
| terminal | end of the neuron's axon from which neurotransmitters are released to stimulate an adjacent cell |
| neurotransmitter | chemical that transmits a nervous system's signal across a synapse |
