Membrane Transport — 2D Cross-Section
Passive diffusion, facilitated (saturating) transport, and the ATP-driven Na⁺/K⁺ pump
Transport mode
Passive diffusion
Facilitated diffusion
Active transport (ATP pump)
Channels / pump units —
4
Side A (outside) concentration —
80
mM
Side B (inside) concentration —
20
mM
Rate —
1.0
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Conc. A (outside)
80 mM
Conc. B (inside)
20 mM
Net flux (A→B)
0.0 mM/s
ATP consumed
0