<p>Movement of an electrical message down a neuron ------action potential</p><p>Positive charge atom located on the inside of the neuron when at rest ---Potassium ion </p><p>The part of the neuron carrying message away from the cell body ------axon</p><p>Positive charge atom located on the outside of the neuron when at rest ------sodium ion</p><p>Open area between two neurons or a neuron and a muscle fiber ------synapse</p><p>Consists of neurons outside the brain and spinal cord-----PNS</p><p>Time when a neuron is changing it’s electrical current from -70 to -55 mv ----depolarization</p><p>This cell carries a message from a taste bud to the brain ------sensory neuron</p><p>Has a cell body in the middle of a cell with one axon out & one dendrite out ----bipolar</p><p>A fatty substance covering parts of an axon that speeds up the message -----myelin sheath</p><p>Houses the nucleus, Golgi bodies, etc in a neuron ------cell body/soma</p><p>A protein molecule on the end of a dendrite that picks up a neurotransmitter ------receptor</p><p>Produces the myelin sheath in the PNS ------Schwann Cells</p><p>Part of the nervous system consisting of the brain and spinal cord ------CNS</p><p>A fluid-filled sac that houses neurotransmitter ------vesicle</p><p>A cell in the nervous system ------neuron</p><p>Forms a connection between a motor and sensory neuron ------interneuron</p><p>Housed in vesicles at the axon terminals ------neurotransmitter</p><p>A change in the electrical current of a cell falling below -70 mv ------hyperpolarization</p><p>Short, branched extensions of a neuron that receive messages from other neurons –dendrites</p><p>Areas where there are gaps in the myelin sheath -----nodes of Ranvier</p><p>When a neuron is not sending an electrical message ------resting potential</p><p>A neuron with only 1 process leaves the cell body & the cell body is located off to the side –unipolar</p><p>The end of the axon where neurotransmitters are housed ------axon terminal</p><p>Branch of medicine specializing in the nervous system ----neurologist The time between application of a stimulus and detection of a response -----reaction time</p><p>Controls the contraction or relaxation of a muscle ----- motor neuron</p><p>Possesses an single axon and many dendrites ------multipolar neuron</p><p>A change in membrane potential that returns it to a negative value ------repolarization</p><p>An involuntary and nearly instantaneous movement in response to a stimulus ---reflex</p>