Factors that Affect Diffusion (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
12 cards from this deck
What is a concentration gradient?
What is a concentration gradient?
The difference in concentration of particles between two areas
How does a steeper concentration gradient affect diffusion?
How does a steeper concentration gradient affect diffusion?
Faster rate of diffusion
Effect of higher temperature on diffusion rate
Effect of higher temperature on diffusion rate
Increases kinetic energy, causing faster diffusion
Effect of lower temperature on diffusion
Effect of lower temperature on diffusion
Slows particle movement, reducing diffusion rate
How does larger surface area affect diffusion?
How does larger surface area affect diffusion?
Increases the rate of diffusion
How does shorter diffusion distance affect rate?
How does shorter diffusion distance affect rate?
Results in faster diffusion
Which diffuse faster: small or large molecules?
Which diffuse faster: small or large molecules?
Small molecules diffuse faster than large molecules
How do nonpolar vs polar molecules diffuse through membranes?
How do nonpolar vs polar molecules diffuse through membranes?
Nonpolar molecules diffuse more easily than polar molecules
Example of large surface area in lungs
Example of large surface area in lungs
Alveoli
Example of large surface area in small intestine
Example of large surface area in small intestine
Villi
Why does oxygen diffuse rapidly in the lungs?
Why does oxygen diffuse rapidly in the lungs?
Large surface area, steep concentration gradient, and short diffusion distance
Which waste product is removed from cells by diffusion?
Which waste product is removed from cells by diffusion?
Carbon dioxide