Cell Size and Efficiency Through Diffusion Experiments

The video explains why cells are small by using diffusion cubes to demonstrate the efficiency of small cells in transporting substances. It highlights the importance of a large surface area to volume ratio, which allows for efficient diffusion. The experiment compares two cells with different ratios, showing that smaller cells diffuse substances more quickly. 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 controls the cell's genetic material.

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

• It determines the color of the cell.

• It influences the cell's ability to reproduce.

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

• 2.66

• 1.25

• 3.50

• 4.00

What materials are used in the diffusion cube experiment?

• Gelatin, ammonia, and phenolphthalein

• Water, salt, and sugar

• Oil, vinegar, and baking soda

• Sand, clay, and water

What role does phenolphthalein play in the experiment?

• It helps in cell division.

• It serves as a base indicator.

• It is used to color the cells.

• It acts as a nutrient for the cells.

Why is vinegar used in the diffusion experiment?

• To start the diffusion process.

• To simulate the cell's natural environment.

• To act as a base for the phenolphthalein.

• To provide nutrients to the cells.

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 was completely diffused.

• It showed no signs of diffusion.

• It had only partially diffused.

• It had changed color completely.

What conclusion can be drawn from the diffusion experiment?

• Both cell sizes diffuse at the same rate.

• Smaller cells are more efficient at diffusion.

• Cell size does not affect diffusion efficiency.

• Larger cells are more efficient at diffusion.

What does the experiment demonstrate about mitochondria in smaller cells?

• They require more time to diffuse substances.

• They do not participate in diffusion.

• They are less efficient in diffusion.

• They quickly diffuse substances due to a higher surface area to volume ratio.

What is the main takeaway from the video regarding cell size?

• Cell size does not impact efficiency.

• All cells have the same surface area to volume ratio.

• Smaller cells have a higher surface area to volume ratio, making them more efficient.

• Larger cells are more adaptable.