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What is the answer to number 2? Please help! :)

What is the answer to number 2? Please help! :)-example-1
User Kstrauss
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For each of the examples, simple diffusion, carrier, and channel mediated, each type involves the flow down a concentration gradient. This means that the molecules flow from an area of high concentration to an area of low concentration. In turn, this allows for a passive process, meaning no ATP is needed! I hope this explains your question.

User TJ Thind
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