John Donovan 4912 Nervous System The nervous system

John Donovan 4/9/12

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.

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.

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.

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.

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.

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.

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.

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.

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.

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