Diffusion & the alveoli (Edexcel GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What type of transport is diffusion?
What type of transport is diffusion?
Passive transport
In which direction do particles move during diffusion?
In which direction do particles move during diffusion?
High to low concentration
Which gases diffuse easily across cell membranes?
Which gases diffuse easily across cell membranes?
Oxygen and carbon dioxide
How does a larger concentration difference affect diffusion rate?
How does a larger concentration difference affect diffusion rate?
Increases rate
What effect does higher temperature have on diffusion?
What effect does higher temperature have on diffusion?
Increases rate
How does distance affect the rate of diffusion?
How does distance affect the rate of diffusion?
Shorter distance = faster
How thick are the walls of alveoli?
How thick are the walls of alveoli?
One cell thick
Why do lungs contain millions of alveoli?
Why do lungs contain millions of alveoli?
Provide large surface area
In Fick's Law, rate of diffusion is inversely proportional to what?
In Fick's Law, rate of diffusion is inversely proportional to what?
Thickness of membrane
Why is rich blood supply important in alveoli?
Why is rich blood supply important in alveoli?
Maintains concentration gradient