Understanding Cell Efficiency and Diffusion

The video explains why cells are small by using diffusion cubes to demonstrate the efficiency of small cells. It highlights the importance of a large surface area to volume ratio, which allows for efficient transport of substances. The experiment compares diffusion rates in different-sized cells, showing that smaller cells diffuse materials more efficiently. The video concludes that smaller cells are more efficient due to their higher surface area to volume ratio.

Why is the surface area to volume ratio important for cells?

• It affects the cell's ability to transport substances efficiently.

• It influences the cell's ability to reproduce.

• It determines the color of the cell.

• It controls the cell's genetic material.

What is the surface area to volume ratio of the smaller cell used in the experiment?

• 3.00

• 2.66

• 1.25

• 0.75

What materials are used in the diffusion cube experiment?

• Oil, vinegar, and baking soda

• Sand, clay, and water

• Water, salt, and sugar

• Gelatin, ammonia, and phenolphthalein

What role does phenolphthalein play in the experiment?

• It acts as a nutrient for cells.

• It is a base indicator used to observe diffusion.

• It provides energy to the cells.

• It is used to measure temperature changes.

How long did it take for the smaller cell to almost completely diffuse?

• 8 minutes

• 36 minutes

• 1 hour

• 2 hours

What was observed in the larger cell after 36 minutes?

• It had changed color entirely.

• It still had a long way to go before complete diffusion.

• It showed no signs of diffusion.

• It had completely diffused.

What conclusion can be drawn from the diffusion experiment?

• Diffusion is not affected by cell size.

• Smaller cells are more efficient at diffusion due to a higher surface area to volume ratio.

• Larger cells are more efficient at diffusion.

• Both small and large cells diffuse at the same rate.

What was the duration of the entire experiment?

• 3 hours

• 2 hours

• 4 hours

• 1 hour

What does the experiment demonstrate about the efficiency of small cells?

• They do not require diffusion.

• They are less efficient than large cells.

• They are equally efficient as large cells.

• They are more efficient at moving materials due to a higher surface area to volume ratio.

What is the main reason for the efficiency of smaller cells in diffusion?

• Their genetic material

• Their shape

• Their color

• Their higher surface area to volume ratio