EVERYDAY SCIENCE

Detailed explanation-1: -Rate of exchange of materials. The other answers are all directly related to the metabolism of the cell but materials exchange is related to the volume and surface area. The greater the volume of a cell the more materials theoretically need to be exchanged but it is limited by the surface area.

Detailed explanation-2: -The surface area of the cell is proportional to the square of its size : L2, and the volume will be proportional to its size cubed : L3.

Detailed explanation-3: -Volume refers to how much of the substance will be exchanged. The larger the surface, the more exchange there is and the reason the rate of exchange is proportaional to the cell’s surface area. The larger the volume, the more substance that will be exchanged.

Detailed explanation-4: -As the cell grows, its surface area to volume ratio decreases, reducing the rate of gas exchange. This is because as the surface to volume ratio decreases, there is not enough surface area (cell membrane) for adequate gas exchange to occur in order to serve the needs of the internal contents (volume) of the cell.

Detailed explanation-5: -The surface area of the membrane affects the rate of diffusion. As the surface area of the membrane increases, the rate of diffusion also increases, as there is more space for molecules to diffuse across the membrane. Distance. The shorter the distance the substances have to move, the faster the rate of diffusion.