Question

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

Answer 1

Carbon dioxide (CO2) moves in and out of the cell by the process of diffusion. Diffusion involves movement of molecules from higher concentration to lower concentration.

Water moves in and out of the cell by osmosis.
Osmosis is the movement of water through a semi permeable membrane from a solution of lower concentration of solutes to a solution of higher concentration of solutes .

Both diffusion and Osmosis are physical process and do not require spending of energy for their performance by the cells.

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Hope this will help you.....

Answer 2

Answer:

Carbon Dioxide CO₂ and water H₂O move across a cell by the process of diffusion and osmosis respectively.

When the concentration of CO₂ is low outside the cell as compared to inside, it moves out, i.e. from a region of high concentration to a region of low concentration.

Also,

when concentration of water increase inside the cell as compared to its exterior, it moves across the plasma region from a region of its high concentration to its low concentration.