1. John Donovan 4/9/12

2. Nervous System The nervous system function is to send electronic signals to different parts of the body to signal them to do a task, such as me typing on the keys write now.

3. CNS The central nervous system consists of the major organs: the brain and the spinal cord. These two organs are the CNS and facilitate the electrical signals that go everywhere.

4. PNS The peripheral nervous system connects the central nervous system to sensory organs such as the eyes, hears, and other organs of the body, muscles, blood vessels and glands.

6. arc This works by the synapsis in the spinal cord. This characteristic allows reflex actions to occur relatively quickly by activating spinal motor neurons without the delay of routing signals through the brain.

8. Nerve Impulse Ions cause an electrical impulse. Neurons and muscle cells are electrically excitable cells, which means that they can transmit electrical nerve impulses. These impulses are due to events in the cell membrane.

9. Neurotransmitters Neurotransmitters are the chemicals which allow the transmission of signals from one neuron to the next across synapses. They are also found at the axon endings of motor neurons, where they stimulate the muscle fibers.

10. Influences (EPSP/IPSP) IPSP and Hyperpolarization: IPSP inhibits neurotransmitter systems cause postsynaptic membranes to hyperpolarize. EPSP and Depolarization: EPSP is the potential that a firing impulse will cross the synapse and releasing a signal.

11. Parkinson's Disease Parkinson's disease is a group of conditions of motor system disorders that are the result of the loss of dopamine-producing brain cells. This disorder makes you shake, or tremor, or cause stiffness in our limbs.

12. Multiple Sclerosis Multiple sclerosis is a potentially debilitating disease in which your body's immune system eats away at the protective sheath that covers your nerves. This interferes with the communication between your brain and the rest of your body. In the long run, this may result in deterioration of the and this is not reversible.

13. 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