Topic 12Biology
B2.1 Membranes and membrane transport
The fluid mosaic model of membrane structure and the passive and active transport mechanisms it supports — diffusion, facilitated diffusion, osmosis, active transport, endocytosis and exocytosis.
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The fluid mosaic modelSign up
The phospholipid bilayer · The fluid mosaic model
35 min
Passive transport — diffusion and osmosisSign up
Simple diffusion + osmosis · Channel proteins — facilitated diffusion
30 min
Active transport and bulk transportSign up
Active transport — pumps against the gradient · Bulk transport, Na/K pump, cotransport (HL)
35 min
Membrane fluidity, gated channels and cell adhesion (HL)HLSign up
Membrane fluidity (HL) · Gated channels and cell adhesion (HL)
30 min