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Biology study guides

AP · Advanced Placement (AP) · aligned to College Board.

AP Biology Unit 2 membrane transport: a complete overview of the plasma membrane, permeability, passive and active transport, and osmoregulation
A deep-dive AP Biology guide to membrane transport in Unit 2. Covers the fluid-mosaic plasma membrane, selective permeability, simple and facilitated diffusion, osmosis with tonicity and water potential, active transport and the sodium-potassium pump, bulk transport, and the quantitative skills and exam patterns the College Board repeats.
📖 18 min read2.4-2.9