B - They both use protein channels (I think so at least) they differ because active transports use a pump to leave the cell and it uses atp (cell energy).
The answer to your question is,
A) A negatively and positively charged ion.
-Mabel <3
The appropriate response is 4800 milliliters. The aggregate volume of replaceable air (key limit) for a typical male is the measure of air that can be drawn into the lungs after a constrained exhalation and, for this situation, is 4800 milliliters.
