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Diffusion and Factors Affecting the Rate of Diffusion

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Diffusion and Factors Affecting the Rate of Diffusion

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Questions and Answers

What is the primary driving force behind the movement of particles in diffusion?

Concentration gradient (correct)

Osmosis

Surface tension

Kinetic energy

Which factor does NOT affect the rate of diffusion?

Temperature

Concentration gradient

Surface area of the membrane

Pressure (correct)

What happens to the rate of diffusion when the temperature decreases?

It increases

It is not affected

It decreases (correct)

It remains constant

How does a larger surface area of the membrane affect the rate of diffusion?

Increases it Signup and view all the answers

Which particle would diffuse more rapidly in a cell with a high concentration of carbon dioxide outside and a low concentration inside?

Carbon dioxide Signup and view all the answers

Explain how the concentration gradient affects the rate of diffusion.

The greater the concentration gradient, the faster the rate of diffusion. A steeper concentration gradient leads to a faster movement of particles. Signup and view all the answers

Describe the role of temperature in the process of diffusion.

Higher temperatures increase the kinetic energy of particles, leading to faster diffusion rates. Lower temperatures decrease the kinetic energy, slowing down the movement of particles. Signup and view all the answers

Why does oxygen move into cells during respiration?

Oxygen moves into cells due to a higher concentration of oxygen outside the cell. This concentration gradient drives oxygen diffusion into the cell for respiration. Signup and view all the answers

How does the size of the surface area of the membrane impact the rate of diffusion?

A larger surface area of the membrane allows for a greater rate of diffusion. More surface area provides more space for particles to move through, increasing the rate of diffusion. Signup and view all the answers

In what way does the movement of carbon dioxide and urea differ from that of oxygen during diffusion?

Carbon dioxide and urea move out of cells as waste products, driven by their higher concentrations inside the cell. Oxygen, however, moves into cells due to a higher concentration outside the cell. Signup and view all the answers

Study Notes

Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration, with examples like oxygen, carbon dioxide, and urea moving in and out of cells by diffusion.
Oxygen moves into cells for respiration due to a higher concentration outside the cell, while carbon dioxide and urea move out of cells as waste products.
Factors affecting the rate of diffusion include the concentration gradient (higher gradient leads to faster diffusion), temperature (higher temperature increases diffusion rate), and surface area of the membrane (larger surface area allows for greater diffusion rate).
The concentration gradient refers to the difference in concentrations between the inside and outside of the cell, with a greater gradient leading to faster diffusion.
Temperature plays a role in diffusion rate as higher temperatures provide particles with more kinetic energy, leading to faster movement.

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Description

Explore the concept of diffusion where particles move from areas of higher concentration to lower concentration. Learn about how oxygen, carbon dioxide, and urea diffuse in and out of cells, and understand the factors that influence the rate of diffusion such as concentration gradient, temperature, and surface area of the membrane.