Nerve Impulse Sequence

Front

What part of a neuron receives information from other neurons?

Back

Dendrites

Front

When does the stimuli cause an action potential?

Back

When it reaches threshold.

Front

What occurs during depolarization?

Back

Sodium channels open.

Front

What are neurotransmitters?

Back

Chemical messengers that transmit signals across a synapse from one neuron to another.

Front

Which ions are involved in the electrical nerve impulse?

Back

Potassium and Sodium.

Front

What is the function of the axon in a neuron?

Back

To transmit electrical impulses away from the cell body.

Front

What is the role of the myelin sheath?

Back

To insulate the axon and increase the speed of nerve impulse transmission.

Front

What is a synapse?

Back

The junction between two neurons where neurotransmitters are released.

Front

What happens when potassium channels open?

Back

It leads to repolarization of the neuron.

Front

What is the resting membrane potential?

Back

The electrical potential difference across the membrane of a resting neuron, typically around -70mV.