Deck 8 Flashcards
The process by which molecules move away from a region where there are more, to a region where there are less
Diffusion
Type of transport in which the cell provides the metabolic energy (ATP) that drives the transport process
Active transport
The unassisted diffusion of solutes through the plasma membrane is called
Simple diffusion
Diffusion of water through a selectively permeable membrane is called
Osmosis
“Water pores”
Aquaporins
Provides passage for certain needed substances that are both lipid-insoluble and too large to pass through the membrane pores
Facilitated diffusion
The process by which water and solutes are forced through a membrane by fluid or hydrostatic pressure
Filtration
Sometimes called solute pumping
Active transport
Simultaneously carries sodium ions out of potassium ions into the cell
Sodium-potassium pump
Moves substances into or out of cells without actually crossing the plasma membrane
Vesicular transport