cell transport

energy required (ATP)

• active

• passive

molecules move along (down) conc. gradient

• active

• passive

molecules move against (up) conc. gradient

• active

• passive

always involves channel (membrane-spanning proteins) - choose 2

• active

• diffusion

• facilitated

molecules pass between phospholipids

• active

• diffusion

• facilitated

move ions like Na and K - choose 2

• active

• diffusion

• facilitated

move large molecules - choose 2

• active

• diffusion

• facilitated

move small nonpolar and polar molecules - choose 2

• active

• diffusion

• facilitated

ALL molecules

• active

• passive

low to high concentration

• passive

• active