Action Potential Review

Front

Neurons transmit information through ________ changes in the cell membrane.

Back

electrical

Front

What do Axon Terminals do?

Back

Sends information to the next cell.

Front

When a neuron is depolarized, what are the first channels to open?

Back

Sodium channels.

Front

What number on the graph represents the Depolarization phase?

Back

2

Front

What number(s) on the graph represents the Resting Potential?

Back

1 and 5.

Front

What is the Resting Potential of a neuron?

Back

The electrical potential difference across the membrane of a neuron when it is not transmitting signals, typically around -70mV.

Front

Define Depolarization in the context of action potentials.

Back

A decrease in the membrane potential, making the inside of the neuron more positive.

Front

What role do Sodium ions play in action potentials?

Back

Sodium ions rush into the neuron during depolarization, causing the membrane potential to become more positive.

Front

What is the significance of the Myelin Sheath?

Back

It insulates the axon and increases the speed of electrical signal transmission.

Front

What happens during the Repolarization phase?

Back

Potassium channels open, allowing potassium ions to exit the neuron, restoring the negative membrane potential.