1. Anything that the cell takes in, such as oxygen of food, or lets out, such as carbon dioxide, must pass through the cell membrane. Which of the measurements of your model cells best represents the surface area of the cell membrane?
2. The cell contents, including the nucleus and the cytoplasm, use food and oxygen and produce wastes. Which two measurements best represent the contents of one of your model cells?
3. As the cell grows larger and accumulates more contents, will it need more or less cell membrane to survive? Explain your answer.
4. As a cell grows larger, does the surface area-to-volume ratio get larger, get smaller, or remain the same?
5. As a cell grows larger, what happens to the surface area-to-mass ratio?
6. Which cell model has the greatest surface area-to-volume and surface area –to-mass ratio?
a. Why can cells not survive when the surface area-to-volume ratio and surface-area-to-mass ratio become too small?
b. Which cell model then has the greatest chance of survival?
8. How many cells with s=1 would fit into a cell with s=2?
9. Which as more total surface area, one cell with s=3… or 27 cells, each with s=1?
10. How can the surface area-to-volume and surface area-to-mass ratios be increased in a large cell?
11. As the length of a side doubles in a cell, what happens to the distance that nutrients must travel to reach the center of the cell?
12. Was your hypothesis supported by your data? Why or why not?