Transport in Cells (AQA GCSE Biology Combined Science): Flashcards
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Practise the cards
10 cards from this deck
What is diffusion?
What is diffusion?
Particles spreading from high to low concentration naturally
Which direction do particles move in diffusion?
Which direction do particles move in diffusion?
From high to low concentration (down concentration gradient)
Effect of temperature increase on diffusion rate
Effect of temperature increase on diffusion rate
Faster diffusion (particles have more energy, move faster)
Effect of concentration difference on diffusion
Effect of concentration difference on diffusion
Bigger difference = faster diffusion rate
Effect of surface area increase on diffusion
Effect of surface area increase on diffusion
Faster diffusion (more particles can move at same time)
Effect of membrane thickness decrease on diffusion
Effect of membrane thickness decrease on diffusion
Faster diffusion (less distance to travel)
Energy required for diffusion
Energy required for diffusion
No energy needed from the cell
Where does oxygen diffuse in the lungs?
Where does oxygen diffuse in the lungs?
From air into blood cells
Where does carbon dioxide diffuse in the lungs?
Where does carbon dioxide diffuse in the lungs?
From blood cells into air
Where does urea diffuse from cells?
Where does urea diffuse from cells?
Out of cells into blood plasma