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Question

How do substances like CO2 and water move in and out of the cell?


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Solution

Diffusion:

  1. Diffusion is the process that allows gases like CO2 and water to enter and exit a cell.
  2. Diffusion involves the movement of a substance or set of molecules from a location of higher concentration to one of lower concentration.
  3. While this process can occur in any of the three states of matter—gases, liquids, or solids—it occurs more quickly in gases.
  4. Water and CO2 go within a cell when their concentration levels are higher outside than they are inside, and vice versa when their concentration levels are lower.

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