Diffusion
Diffusion is the movement of molecules from a high concentration to a low concentration.
What is the direction of movement of molecules in diffusion?
Osmosis is the movement of water molecules.
Which molecules move in osmosis?
The movement of molecules or ions across a cell membrane from a low concentration to a high concentration.
What is active transport?
2
How many types of molecules make up the cell membrane?
Diffusion is passive and does not require energy.
Does diffusion require energy?
Is diffusion active or passive?
Osmosis is passive. so does not require energy.
Does osmosis require energy?
Active transport requires energy.
Does active transport require energy?
What is the energy for active transport?
Phospholipids and Proteins
What are the names of the two molecules of the cell membrane?
Molecules move down the concentration in diffusion.
Do molecules move down or against the concentration in diffusion?
Water molecules move down the concentration in osmosis?
Do water molecules move down or against the concentration in osmosis?
Molecules move against the concentration in active transport.
Do move down or against the concentration in active transport?
Fluid describes the flexible nature of the cell membrane.
What does 'fluid' mean?
Oxygen
Which gas enters a cell by diffusion.
When a plant cell has been placed in a strong sugar or salt solution and water moves out of the cell.
What is plasmolysed?
Mosaic
Which word describes the random nature of proteins in the cell membrane structure?
A plant cell that has been placed in pure water and the cell becomes 'swollen'.
What is turgid?