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Name __________________________________________
Period _____ Date __________
The Cell Transport Book Work!
Read pages 89-91 in your text book to help you answer these questions!
Define the following vocabulary:
Active transport: ____________________________________________________________________________________
Endocytosis: _______________________________________________________________________________________
Phagocytosis: ______________________________________________________________________________________
Exocytosis: _________________________________________________________________________________________
Answer the following questions:
1. How do transport proteins that are pumps differ from those that are channels?
2. How do endocytosis and exocytosis differ from diffusion?
3. Small lipid molecules are in high concentration outside a cell. They slowly cross the membrane into the cell.
What term describes t his action? Does it require energy?
4. Ions are in low concentration outside a cell. They move rapidly into the cell via protein molecules. What term
describes this action? Does it require energy?
5. Suppose molecules were unable to diffuse into and out of cells. How might life be different if cells had to use
active transport to move every substance? Explain your reasoning.