Answer:
The inward flow of sodium ions increases the concentration of positively charged cations in the cell and causes depolarization, where the potential of the cell is higher than the cell's resting potential. The sodium channels close at the peak of the action potential, while potassium continues to leave the cell.
Answer:
the diaphragm helps draw air into the lungs
I believe the best choice will be B)
when people start creating more people in the world and they grow up
