Movement of an Electrical Message Down a Neuron Action Potential

Movement of an electrical message down a neuron ------action potential

Positive charge atom located on the inside of the neuron when at rest ---Potassium ion

The part of the neuron carrying message away from the cell body ------axon

Positive charge atom located on the outside of the neuron when at rest ------sodium ion

Open area between two neurons or a neuron and a muscle fiber ------synapse

Consists of neurons outside the brain and spinal cord-----PNS

Time when a neuron is changing it’s electrical current from -70 to -55 mv ----depolarization

This cell carries a message from a taste bud to the brain ------sensory neuron

Has a cell body in the middle of a cell with one axon out & one dendrite out ----bipolar

A fatty substance covering parts of an axon that speeds up the message -----myelin sheath

Houses the nucleus, Golgi bodies, etc in a neuron ------cell body/soma

A protein molecule on the end of a dendrite that picks up a neurotransmitter ------receptor

Produces the myelin sheath in the PNS ------Schwann Cells

Part of the nervous system consisting of the brain and spinal cord ------CNS

A fluid-filled sac that houses neurotransmitter ------vesicle

A cell in the nervous system ------neuron

Forms a connection between a motor and sensory neuron ------interneuron

Housed in vesicles at the axon terminals ------neurotransmitter

A change in the electrical current of a cell falling below -70 mv ------hyperpolarization

Short, branched extensions of a neuron that receive messages from other neurons –dendrites

Areas where there are gaps in the myelin sheath -----nodes of Ranvier

When a neuron is not sending an electrical message ------resting potential

A neuron with only 1 process leaves the cell body & the cell body is located off to the side –unipolar

The end of the axon where neurotransmitters are housed ------axon terminal

Branch of medicine specializing in the nervous system ----neurologist The time between application of a stimulus and detection of a response -----reaction time

Controls the contraction or relaxation of a muscle ----- motor neuron

Possesses an single axon and many dendrites ------multipolar neuron

A change in membrane potential that returns it to a negative value ------repolarization

An involuntary and nearly instantaneous movement in response to a stimulus ---reflex