Factors that Affect Diffusion Rate

The video tutorial explains the factors affecting diffusion rate, including molecular weight, concentration gradient, surface area to volume ratio, and heat. Molecular weight has an inverse relationship with diffusion rate, while the other factors have direct relationships. The tutorial uses analogies and examples to illustrate these concepts, emphasizing the importance of understanding these factors for biological processes.

What is the relationship between molecular weight and diffusion rate?

• No relationship

• Exponential relationship

• Inverse relationship

• Direct relationship

Which molecule would diffuse faster based on molecular weight?

• A molecule with 500 Daltons

• A molecule with 44 Daltons

• A molecule with 3 million Daltons

• A molecule with 1000 Daltons

How does an increase in concentration gradient affect diffusion rate?

• Reverses diffusion direction

• No effect on diffusion rate

• Decreases diffusion rate

• Increases diffusion rate

What happens to diffusion rate when the concentration gradient decreases?

• It remains the same

• It becomes unpredictable

• It decreases

• It increases

What is the effect of a larger surface area to volume ratio on diffusion rate?

• Reverses diffusion direction

• No effect on diffusion rate

• Increases diffusion rate

• Decreases diffusion rate

Which structure is likely to have a higher diffusion rate?

• A structure with a small surface area to volume ratio

• A structure with a constant volume

• A structure with a large surface area to volume ratio

• A structure with no surface area

How does increasing temperature affect the diffusion rate?

• No effect on diffusion rate

• Increases diffusion rate

• Reverses diffusion direction

• Decreases diffusion rate

What is the role of kinetic energy in diffusion?

• It decreases with temperature

• It increases with temperature

• It remains constant

• It reverses diffusion direction

Which factor has an inverse relationship with diffusion rate?

• Surface area to volume ratio

• Concentration gradient

• Heat

• Molecular weight

Which of the following factors directly increases diffusion rate?

• None of the above

• Concentration gradient

• Molecular weight

• All of the above