009 Depolarization: Phase 1 of the Action Potential

What does the action potential simulator represent in the video?

• The movement of potassium ions

• The function of neurotransmitters

• The process of depolarization

• The resting state of a neuron

Why do sodium ions want to enter the cell?

• To make the membrane potential more negative

• To reach the Donnan equilibrium potential

• To decrease the cell's energy consumption

• To increase the concentration of potassium inside the cell

What is the resting membrane potential range mentioned in the video?

• -10 to -30 millivolts

• +50 to +70 millivolts

• 0 to +30 millivolts

• -50 to -70 millivolts

What triggers the opening of voltage-gated sodium channels?

• A stimulus causing the membrane potential to reach threshold

• A decrease in membrane potential to -100 millivolts

• An increase in internal potassium concentration

• A decrease in external sodium concentration

What happens to the membrane potential during depolarization?

• It becomes more positive

• It becomes more negative

• It fluctuates randomly

• It remains unchanged