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NERVOUS SYSTEM & ENDOCRINE SYSTEM

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Nervous System

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Terms in this set (34)

The electrochemical communication system of the body

The building blocks of the nervous system

The branching extensions of a neuron that receive information and conduct impulses toward the cell body (soma)

The cell body of a neuron, which contains the nucleus and other parts that keep the cell healthy

The extension of a neuron through which neural impulses are sent

protects the axon and influences the speed of the neural impulse

The endpoint of a neuron where neurotransmitters are stored

Action Potential

a brief electrical charge that travels down the axon of a neuron

Refractory Period

The "recharging phase" during which a a neuron, after firing, cannot generate another action potential

Resting Potential

The state of a neuron when it is at rest and capable of generating an action potential

All-or-None Principle

The principle stating that if a neuron fires, then it always fires at the same intensity

The tiny, fluid-filled gap between the axon terminal of one neuron and the dendrite of another

Neurotransmitters

A chemical messenger that travels across the synapse from one neuron to the next and influences whether a neuron will generate an action potential

Excitatory Effect

A neurotransmitter effect that makes it more likely that the receiving neuron will generate an action potential or "fire"