Electrical control

2. The fatty layer surrounding axons, speeding up electrical transmission.
4. Neurons that transmit signals from the CNS to muscles or glands to initiate action.
5. Branch-like extensions of a neuron that receive electrical signals from other neurons.
9. A sudden surge of electrical activity in neurons.
11. A nerve cell that transmits electrical impulses.
13. The gap between two neurons where signals are transmitted via neurotransmitters.
15. A rapid electrical signal that travels along the axon of a neuron.
16. The main pathway for transmitting electrical signals between the brain and the body.
17. Nerves outside the CNS that transmit electrical signals to and from the body.
18. The long extension of a neuron that conducts electrical impulses away from the cell body.

1. Consists of the brain and spinal cord, processing electrical signals.
3. The level of stimulus required to trigger an action potential.
6. The neural pathway that mediates a reflex action, involving sensory neurons, motor neurons, and the spinal cord.
7. The organ that controls and coordinates electrical signals, emotions, thought, and actions.
8. Chemicals that transmit signals across synapses between neurons.
10. Neurons that carry signals from sensory receptors to the CNS.
12. The part of the nervous system that controls involuntary bodily functions.
14. An automatic, rapid response to a stimulus controlled by the spinal cord.