Question

What ions flow outside the memberance during depolarization?

Answer 1

During depolarization, sodium ions (Na+) flow outside the cell, changing the relative charge inside the neuron. This occurs due to a concentration gradient and the opening of ion channels.

Step-by-step explanation:

During depolarization, sodium ions (Na+) flow outside the cell.

This occurs because there is a higher concentration of sodium ions outside the cell compared to inside the cell, creating a concentration gradient. As a result, sodium ions rush into the cell through opened ion channels.

The flow of sodium ions during depolarization causes the relative charge inside the neuron to become less negative, moving towards zero.

Answer 2

During depolarization, sodium ions (Na+) flow outside the membrane, causing a change in the relative charge inside the neuron.

Step-by-step explanation:

During depolarization, the ions that flow outside the membrane are sodium ions (Na+). When a channel opens for Na+ in the membrane, the higher concentration of Na+ outside the cell drives the influx of positive ions into the cell. This causes a change in the relative charge inside the neuron, making it less negative. This process is known as depolarization.