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Biology Section 3.4

What is passive transport? The movement of a substance across a membrane DOWN the concentration gradient.
Is diffusion passive or active transport? Passive because solutes go from higher concentration to lower concentration.
What is concentration gradient? the process of particles moving through a solution from an area of higher number of particles to an area of lower number of particles.
How do we know when a system has reached equilibrium? when both sides are moving equally
What is osmosis? Diffusion of water across a selectively permeable membrane
How does osmosis relate to solute concentrations? When solute concentration is lower, the concentration of water is higher, and when the solute concentration is higher, the concentration of water is lower.
Isotonic solution When the concentration of two solutions is the same
Hypertonic solution when comparing two solutions, the solution with the greater concentration of solutes
Hypotonic solution when comparing two solutions, the solution with the lesser concentration of solutes
Compare Passive Transport and Facilitated Diffusion They both move things across cell membranes going from high to low.
Contrast Passive Transport and Facilitated Diffusion Passive transport slips through the membrane, but diffusion needs help from protein.
Created by: moxiejacobs