How are simple diffusion and facilitated diffusion similar? How are they different?

How is active transport different from simple diffusion and facilitated diffusion?

  • Answer:

    Simple diffusion = flow of small molecules ALONG the concentration gradient, does NOT require energy. facilitated diffusion = flow of molecules ALONG the concentration gradient with help of CARRIER PROTIENS or CHANNELS, does NOT require energy active transport= flow of larger or charged molecules AGAINST their concentration gradient, REQUIRES input of ENERGY in the form of ATP.)

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