18 Questions
Which factor has the greatest effect on the rate of diffusion?
Concentration gradient
How does temperature affect the rate of diffusion?
Higher temperature increases the kinetic energy of particles, increasing the rate of diffusion
Which of the following states of matter has the fastest rate of diffusion?
Gas
How does the mass of diffusing molecules affect the rate of diffusion?
Heavier molecules diffuse slower due to higher inertia
How does the distance a substance must travel affect the rate of diffusion?
The greater the distance, the slower the rate of diffusion
How does increasing the surface area of a membrane affect the rate of diffusion?
Increasing the surface area increases the rate of diffusion
What is the role of microvilli in absorption in the small intestine?
Increase surface area for diffusion
Why is diffusion considered a relatively slow process?
Continuous collisions among diffusing particles
What happens to diffusion when the concentration of a substance is equal in two areas?
It stops
Why do cells increase surface area for diffusion using microvilli?
To facilitate rapid absorption
What is the impact of temperature on the rate of diffusion?
Higher temperature increases diffusion rate
How do cells in the kidney or intestinal wall increase the rate of absorption through diffusion?
By forming microvilli to increase surface area
What is the main function of a cell membrane?
Regulation of substances entering and leaving the cell
Which type of transport moves substances from an area of high concentration to an area of low concentration without using cellular energy?
Passive transport
What drives diffusion in cells?
Random movements of particles due to kinetic energy
How does concentration gradient affect the rate of diffusion?
Higher concentration gradient leads to faster diffusion
What role does surface area play in the rate of diffusion?
Surface area directly affects the rate of diffusion
How does temperature affect the rate of diffusion in cells?
Higher temperature increases the rate of diffusion
Explore the key factors that influence the rate of diffusion, including concentration gradient, temperature, surface area, and mass of molecules. Understand how each factor impacts the speed at which substances diffuse through membranes.
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