Active Transport vs Diffusion
Cells move substances in different ways depending on the concentration gradient and the energy available.
Which one needs ATP from respiration?
What is Active Transport vs Diffusion?
"Passive transport (diffusion) moves particles down a gradient; active transport moves them against a gradient using energy."
Diffusion is the net movement of particles:
Which change would increase the rate of diffusion?
In the lungs, oxygen moves from the alveoli into the blood by:
Mechanism Comparison
Diffusion is passive (no energy); Active Transport is active (requires energy).
Diffusion moves down the gradient; Active Transport moves against it.
Active transport requires carrier proteins in the cell membrane.
If a question mentions root hair cells or the gut, think about active transport.
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