Question

Drag the labels onto the flowchart to show the sequence of events that occurs once the membrane potential reaches threshold. You may use a label once or not at all.

Answer 1

Note: Question is incomplete i have added full question and answer in the attachment.

Answer:

These three steps occur once the membrane potential reaches threshold.

1. many voltage-gated Na+ channels open
2. Na+ ions rush into the cell
3. membrane potential rises

Explanation:

When membrane achieve threshold sodium-potassium gates opens and let the sodium pass into the cell from outside of membrane. This mechanism is called membrane depolarization. As this mechanism occur membrane voltage achieve resting membrane potential. See image for better understanding how it happens.