Factors that Affect Diffusion (OCR GCSE Biology A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is a concentration gradient?
What is a concentration gradient?
Difference in concentration between areas
How does a steeper concentration gradient affect diffusion rate?
How does a steeper concentration gradient affect diffusion rate?
Makes diffusion faster
What effect does higher temperature have on particles?
What effect does higher temperature have on particles?
Increases their kinetic energy
How does lower temperature affect diffusion rate?
How does lower temperature affect diffusion rate?
Reduces the rate of diffusion
How does a larger surface area affect diffusion?
How does a larger surface area affect diffusion?
Increases the rate of diffusion
Which lung structure has a large surface area for gas exchange?
Which lung structure has a large surface area for gas exchange?
Alveoli
What feature of villi maximises diffusion rate in the small intestine?
What feature of villi maximises diffusion rate in the small intestine?
Large surface area and thin walls
How does diffusion distance affect diffusion rate?
How does diffusion distance affect diffusion rate?
Shorter distances cause faster diffusion
Why are cells and tissues often thin?
Why are cells and tissues often thin?
To reduce the diffusion distance
Which molecules diffuse faster?
Which molecules diffuse faster?
Smaller molecules like oxygen
Which type of molecule diffuses more easily through cell membranes?
Which type of molecule diffuses more easily through cell membranes?
Nonpolar molecules
Why does oxygen diffuse rapidly from alveoli into blood?
Why does oxygen diffuse rapidly from alveoli into blood?
Large area, steep gradient, short distance