Nervous system

1. / neurotransmitter that passes AP along to the muscle
5. body / contains the nucleus and allows cell processes to radiate out
7. / junction between a neuron and another cell
10. / this type of potential can excite or inhibit the neuron
12. / this speeds up action potentials
14. / sensory nerves
16. / more Na+ channels open during this polarization
18. / excitatory potential that happens when the depolarization threshold is reached
19. / senders of signal and are at the end of the neuron
20. / receivers of impulse and the beginning of neuron

2. / more K+ channels open during this polarization
3. / motor nerves
4. / contains the brain and spinal cord
6. / contains motor neuron and all the muscle fibers it stimulates
8. / the difference in electrical charges between outside and inside of the cell (-70mV)
9. / contains sensory and motor neurons branching out to the rest of the body
11. / the basic structural unit of the nervous system
13. / changes in membrane permeability to Na+ and K+
15. / this nervous system is voluntary and contains skeletal muscles
17. / this nervous system contains the sympathetic and parasympathetic systems