claim the interaction of motrin and robitussin can cause heart attacks in children
Active transport. Active transport is the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higher concentrationâin the direction against some gradient or other obstructing factor (often a concentration gradient).
What does active transport occur only in living organism's cells? What are the molecules involved in respiratory electron transport chain? What is the purpose of the electron transport chain?