1. Transport in and out of cells
Give examples of molecules that move into and out of cells
Describe the processes by which different kinds of molecules move
Explain why different molecules are moved in different ways

2. What substances do cells exchange with their environment?
Can you name some substances that cells exchange with their surroundings?
For each substance:
Does it move into or out of cells, or both?
How do you think it moves into or out of the cell?

3. Types of Transport
Go to and enter the code 22rcxdd
Watch the video and as you watch it make notes on the three ways molecules move into and out of cells.
For each type of transport make sure you include:
An example of a molecule
An explanation of why the molecule moves
Whether it requires energy
Key terms from the video

4. Check your notes Check your notes for the following key terms.
Do you know what each term means?
If any of them are missing you need to add them to your notes in the appropriate place!
Passive
Diffusion
Concentration gradient
Partially permeable
Membrane
Energy
Active transport
Oxygen / carbon dioxide
Osmosis
Active
Against the concentration gradient
Down the concentration gradient
Glucose
Water
Solute concentration
Carrier protein

5. Summary Table
Copy and complete the table to summarise the key features of each type of transport:
Feature
Diffusion
Osmosis
Active Transport
Example of molecule
Direction (compared to concentration gradient)
Does it require energy?
Does it require a carrier protein?
How does it work?

6. Name the type of transport
Definition
The spreading out of particles from an area of high concentration to an area of low concentration. Does not require energy
The diffusion of water from an area of high water concentration (dilute solution) to an area of low water concentration (concentrated solution) across a partially permeable membrane
The movement of molecules against a concentration gradient (from an area of low concentration to an area of high concentration) across a membrane. This requires energy.
Diffusion
Osmosis
Active Transport