Question

complete the paragraph. at the start of the video, there is a higher concentration of carbon dioxide molecules inside the cell than outside the cell. during diffusion, molecules cross the cell membrane. molecules move from inside the cell to the outside, until the concentration outside the cell is the concentration inside the cell. overall, the video shows that the net movement of carbon dioxide is down its concentration gradient.

Explanation:

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. In the context of a cell, carbon - dioxide molecules move by simple diffusion. If there is a higher concentration of carbon - dioxide inside the cell than outside, carbon - dioxide molecules will cross the cell membrane and move from inside the cell to the outside until the concentration outside the cell is equal to the concentration inside the cell. This is due to the concentration gradient.

Answer:

At the start of the video, there is a higher concentration of carbon dioxide molecules inside the cell than outside the cell. During diffusion, molecules cross the cell membrane. Carbon - dioxide molecules move from inside the cell to the outside, until the concentration outside the cell is equal to the concentration inside the cell. Overall, the video shows that the net movement of carbon dioxide is down its concentration gradient.