Diffusion (AQA 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
In diffusion, particles move from areas of what concentration to areas of what concentration?
In diffusion, particles move from areas of what concentration to areas of what concentration?
Higher to lower
Does diffusion require energy from the cell?
Does diffusion require energy from the cell?
No, it is passive transport
What is a concentration gradient?
What is a concentration gradient?
Difference in concentration across space
Which direction do particles move along a concentration gradient?
Which direction do particles move along a concentration gradient?
Down the gradient
Which two gases are examples of small molecules that diffuse easily across cell membranes?
Which two gases are examples of small molecules that diffuse easily across cell membranes?
Oxygen and carbon dioxide
Which dissolved substances can diffuse through membranes?
Which dissolved substances can diffuse through membranes?
Glucose and amino acids
Where does oxygen diffuse from in the lungs?
Where does oxygen diffuse from in the lungs?
From alveoli into blood
Where does carbon dioxide diffuse to in the lungs?
Where does carbon dioxide diffuse to in the lungs?
From blood into alveoli
What is homeostasis?
What is homeostasis?
Stable internal conditions for life
What may ions like sodium and potassium require to diffuse through cell membranes?
What may ions like sodium and potassium require to diffuse through cell membranes?
Specific channels