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).
Active transport is used to move molecules and ions across a membrane against their concentration gradient. Active means that the transporter requires energy to do its job (â¦ eg. glucose).