The Neuron

2. The basic unit of the nervous system. Transmits electrical and chemical signals throughout the body.
4. The reabsorption of excess neurotransmitters by the presynaptic neuron after a signal has been transmitted. The process recycles the neurotransmitters.
6. A rapid, all-or-nothing electrical impulse that travels down the axon, allowing a neuron to communicate with other cells.
8. Support cell for neurons. Do not transmit signals.
11. A brief period following an action potential during which a neuron is not able to fire.

1. Button-like ending of an axon, where neurotransmitters are released in the synapse.
3. Branch-like extensions of a neuron, receiving chemical signals from other neurons.
5. The critical level of electrical stimulation that must be reached for a neuron to fire an action potential.
7. Long, slender projection that conducts action potentials away from cell body.
9. Fatty, protective coating insulating the axon and increasing the speed of electrical signal transmission.
10. The baseline electrical stimulation that must be reached for a neuron to fire an action potential.
12. The main part of a neuron containing the nucleus.