Diffusion Flashcards
What is a concentration gradient
Difference in concentration
How does temperature affect diffusion
High temperature means the particles have more energy and will move across the gradient quicker
How does surface area affect diffusion
More particles can pass through meaning faster rate of diffusion
How does distance affect diffusion
Shorter distances mean the particle has to travel less, faster rate
4 factors that affect diffusion
Concentration Gradient
Temperature
Surface Area
Diffusion Distance
Why do small organism have a larger SA:V
Easier to transport molecules, quicker rate of diffusion
Alveoli adapted for diffusion
Bigger surface area
Thin Walls - Shorter diffusion distance
Moist walls - Moisture helps to dissolve gases
Concentration meaning
Mass of solute per volume
Why is cocoa powder used in warm milk rather than cold
Warm milk means the particles have more energy and will diffuses faster
Examples of diffusion
Diffusion of oxygen and co2
Kidney filtering out waste and salt
