| A | B |
|---|
| resting potential | Outside of axon's membrane is positively charged. |
| reverse polarity | Inside of neuron's membrane is positively charged. |
| sodium (Na) ion | Present in large amounts outside a resting neuron. |
| sodium pump | actively tranports sodium out of the cell to restore resting potential |
| neurotransmitter | allows the impulse to cross a synapse |
| saltatory conduction | allows for speedy transmission in myelinated neurons |
| myelin | insulating material which speeds transmission |
| nerve impulse | a series of action potentials sweeping along a neuron |
| all or none law | neuron transmits at full strength and speed or not at all |
| repolarization | occurs immediately after an action potential |
| potassium (K) ion | present in large amounts inside the membrane of a resting neuron |
| cholinesterase | destroys acetylcholine to allow stoppage of the impulse |
