When the "cargo" is too big for a protein pump, the cell membrane wraps around it.
It pumps three sodium ions out of the cell and two potassium ions in. what uses active transport
Your cells couldn't produce the ATP needed for basic survival. If you are working on a specific project, let me know: Is this for a biology lab report ? Are you prepping for a medical exam (like the MCAT)? Do you need a simplified version for a younger audience? When the "cargo" is too big for a