Factors Affecting Rate of Diffusion

Play an AI-generated podcast conversation about this lesson

Which factor has the greatest effect on the rate of diffusion?

Surface area of the membrane

Temperature

Mass of the diffusing molecules

Concentration gradient (correct)

How does temperature affect the rate of diffusion?

Higher temperature decreases the rate of diffusion

Higher temperature increases the kinetic energy of particles, increasing the rate of diffusion (correct)

Temperature has no effect on the rate of diffusion

Higher temperature increases the mass of the diffusing molecules, decreasing the rate of diffusion

Which of the following states of matter has the fastest rate of diffusion?

Liquid

Solid

All states of matter have the same rate of diffusion

Gas (correct)

How does the mass of diffusing molecules affect the rate of diffusion?

Heavier molecules diffuse slower due to higher inertia Signup and view all the answers

How does the distance a substance must travel affect the rate of diffusion?

The greater the distance, the slower the rate of diffusion Signup and view all the answers

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

Increasing the surface area increases the rate of diffusion Signup and view all the answers

What is the role of microvilli in absorption in the small intestine?

Increase surface area for diffusion Signup and view all the answers

Why is diffusion considered a relatively slow process?

Continuous collisions among diffusing particles Signup and view all the answers

What happens to diffusion when the concentration of a substance is equal in two areas?

It stops Signup and view all the answers

Why do cells increase surface area for diffusion using microvilli?

To facilitate rapid absorption Signup and view all the answers

What is the impact of temperature on the rate of diffusion?

Higher temperature increases diffusion rate Signup and view all the answers

How do cells in the kidney or intestinal wall increase the rate of absorption through diffusion?

By forming microvilli to increase surface area Signup and view all the answers

What is the main function of a cell membrane?

Regulation of substances entering and leaving the cell Signup and view all the answers

Which type of transport moves substances from an area of high concentration to an area of low concentration without using cellular energy?

Passive transport Signup and view all the answers

What drives diffusion in cells?

Random movements of particles due to kinetic energy Signup and view all the answers

How does concentration gradient affect the rate of diffusion?

Higher concentration gradient leads to faster diffusion Signup and view all the answers

What role does surface area play in the rate of diffusion?

Surface area directly affects the rate of diffusion Signup and view all the answers

How does temperature affect the rate of diffusion in cells?

Higher temperature increases the rate of diffusion Signup and view all the answers

Factors Affecting Rate of Diffusion

Choose a study mode

Podcast

Questions and Answers