The Nervous System

Front

What is the charge inside a neuron compared to the outside?

Back

Negative charge.

Front

What is a neurotransmitter?

Back

A chemical messenger that transmits signals across a synapse from one neuron to another.

Front

What is the change of a cell membrane from positive to negative called?

Back

Action Potential.

Front

What is the primary function of the nervous system?

Back

To send messages to and from the brain and spinal cord to and from the body.

Front

Which part of the neuron is myelinated?

Back

Axon.

Front

What is the role of the axon in a neuron?

Back

To transmit electrical impulses away from the cell body.

Front

What is the function of dendrites?

Back

To receive signals from other neurons.

Front

What is the synapse?

Back

The gap between two neurons where neurotransmitters are released.

Front

What is myelin?

Back

A fatty substance that insulates axons and speeds up signal transmission.

Front

What is the resting potential of a neuron?

Back

The electrical charge difference across the membrane when the neuron is not firing.