Factors Affecting Diffusion and Fixed Law

The video tutorial explains diffusion, a process where particles move from high to low concentration areas. It covers factors affecting diffusion rate, including surface area, concentration gradient, and diffusion distance. Fick's Law is introduced, showing the relationship between these factors and diffusion rate. The video also demonstrates how to apply Fick's Law in calculations, providing examples to illustrate the concepts. The tutorial concludes with a summary of the key points discussed.

What is the primary mechanism by which oxygen and carbon dioxide move in and out of cells?

• Osmosis

• Facilitated diffusion

• Diffusion

• Active transport

How does an increase in surface area affect the rate of diffusion?

• It increases the rate of diffusion.

• It has no effect on the rate of diffusion.

• It decreases the rate of diffusion.

• It reverses the direction of diffusion.

What happens to the rate of diffusion when the concentration gradient is steeper?

• The rate of diffusion decreases.

• The rate of diffusion becomes unpredictable.

• The rate of diffusion remains constant.

• The rate of diffusion increases.

Which factor is inversely proportional to the rate of diffusion according to Fick's Law?

• Thickness of the membrane

• Concentration difference

• Temperature

• Surface area

If the thickness of a membrane is doubled, what happens to the rate of diffusion?

• It halves.

• It doubles.

• It quadruples.

• It remains the same.

According to Fick's Law, what is the effect of doubling the concentration difference on the rate of diffusion?

• The rate of diffusion is quadrupled.

• The rate of diffusion is doubled.

• The rate of diffusion remains unchanged.

• The rate of diffusion is halved.

What is the relationship between surface area and the rate of diffusion as per Fick's Law?

• They are inversely proportional.

• They are directly proportional.

• They are logarithmically related.

• They are unrelated.