Passive Transport
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12 Terms
Q: What is passive transport?
A: Movement down a concentration gradient without ATP.
Q: Does passive transport require ATP?
A: No.
Q: What drives passive transport?
A: Concentration gradient.
Q: What is diffusion?
A: Net movement from high concentration to low concentration.
Q: When does diffusion stop?
A: At equilibrium.
Q: Does equilibrium mean molecules stop moving?
A: No, only net movement stops.
Q: What is osmosis?
A: Diffusion of water across a selectively permeable membrane.
Q: Water moves toward what?
A: Higher solute concentration.
Q: Water moves from ___ water potential to ___ water potential.
A: Higher → lower.
Q: What is facilitated diffusion?
A: Passive transport using membrane proteins.
Q: Does facilitated diffusion require ATP?
A: No.
Q: Which proteins perform facilitated diffusion?
A: Channel proteins and Carrier proteins.