Diffusion (AQA GCSE Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is diffusion?
What is diffusion?
Movement from high to low concentration
Why is diffusion described as passive transport?
Why is diffusion described as passive transport?
It does not require energy from the cell
In which direction do particles move during diffusion?
In which direction do particles move during diffusion?
Down the concentration gradient
Which gases diffuse easily across cell membranes?
Which gases diffuse easily across cell membranes?
Oxygen and carbon dioxide
Which small molecules dissolved in water can diffuse through membranes?
Which small molecules dissolved in water can diffuse through membranes?
Glucose and amino acids
How do ions like sodium and potassium diffuse through cell membranes?
How do ions like sodium and potassium diffuse through cell membranes?
They may require specific channels
Where does oxygen diffuse from in the lungs?
Where does oxygen diffuse from in the lungs?
From the alveoli into the blood
Why does carbon dioxide diffuse from blood into alveoli?
Why does carbon dioxide diffuse from blood into alveoli?
Its concentration is higher in blood
Where does glucose diffuse in the small intestine?
Where does glucose diffuse in the small intestine?
From the gut into the blood
Why is diffusion essential for homeostasis?
Why is diffusion essential for homeostasis?
It maintains stable internal conditions