x

1. ACTIVE TRANSPORT
H L B I O LO GY
C E L L S & B I O M O L E C U L E S

2. ACTIVE TRANSPORT
Active transport involves the
movement of substances AGAINST
their concentration gradient.
This means ENERGY must be used.
The unit of energy in cells is called
ATP

3. ATP
ATP stands for Adenosine TriPhosphate
Each ATP molecule is made up of one
adenosine molecule and THREE
phosphate molecules
Energy is released when one of the
phosphate molecules is released.

5. SODIUM POTASSIUM PUMP

6. QUESTIONS
1. Explain the difference between passive and active transport
2. Draw a series of diagrams to explain the sodium-potassium
pump
3. Research the processes of endocytosis and exocytosis
a. Draw a flow chart to show each process, including notes on
each step
b. explain the difference between each process
4. Explain why endocytosis and exocytosis are known as
examples of active transport
5. Research the condition Cystic Fibrosis and explain how it
relates to active transport pumps.