Question

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

Answer 1

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The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration.

• When the concentration outside the cell becomes low and it is high inside the cell, they moves out.

Answer 2

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CO2 moves by diffusion – These cellular waste accumulates in high concentrations in the cell, whereas the concentration of CO2 in the external surroundings is comparatively lower. This difference in the concentration level inside and out of the cell causes the CO2 to diffuse from a region of higher(within the cell) to a lower concentration.

H2O diffuses by osmosis through the cell membrane. It moves from a region of higher concentration to a lower concentrated region through a selectively permeable membrane until equilibrium is reached.