the transport of a substances through a cell membrane along a concertration gradient with the aid of a carrier
_______ is to pump or move materials across the cell membrane against the concentration gradient
Sodium potassium ATPase pump.
A non-energy requiring process that moves materials across a cell membrane with the concentration gradient.
the process that utilizes a carrier to move materials across the plasma membrane in the direction of theconcentration 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 (eg. glucose).