Cell Membrane Transport Name Type of Transport Direction (passive of or Movement active?) Diffusion Facilitated Diffusion Osmosis Active Transport Does it require energy? What types of molecules use this transport? Membrane Structure Review
1. Give 3 functions of the plasma membrane.
a.
b.
c.
2. What is meant by the term “selectively permeable”?
3. Label the plasma membrane (phospholipids, cholesterol, peripheral proteins, integral proteins,
cholesterol, carbohydrate chains)
4. The head of the phospholipid is hydro_______ and the tail of the phospholipid is
hydro________.
5. The __________ _____________ ___________ describes the arrangement of molecules in
the cell membrane.
Types of Membrane Transport Review
6. Simple ____________ requires NO energy to move things across the cell membrane.
7. With diffusion, molecules move from an area of _____ concentration to an area of ______
concentration.
8. Osmosis is the diffusion of _________ across a cell membrane.
9. Passive transport does _______ require additional energy & moves materials from ________ to
_________ concentration.
10. Facilitated diffusion uses _____________ proteins to help move materials from _________ to
__________ concentrations.
11. __________ transport requires additional energy to move materials.
12. Active transport uses cellular energy known as _________.
13. Active transport moves materials AGAINST the concentration gradient or from _________ to
___________ concentration.
14. The _______________ pump is an example of active transport.
15. Moving very large particles out of the cell is called _____________.
16. In exocytosis, wastes are moved out of the cell in ___________ that fuse with the cell
membrane.
17. __________ involves moving large particles into the cell.
18. Taking in large liquid droplets is called ____________ or "cell drinking".
19. "Cell eating" is known as ______________.
20. (6 pts) Label each beaker solution as isotonic, hypertonic, or hypotonic and draw an arrow to show the
direction of water movement by osmosis. (Solutes cannot move.)