Name:
Thomases’ Active & Passive Transport worksheet
1. The cell membrane is described as selectively permeable. What does this mean?
2. What molecules make up the cell membrane?
3. Draw one phospholipid and label the hydrophobic end and hydrophilic end.
4. Now draw a small portion of cell membrane showing how the phospholipids are arranged.
5. The phospholipids in the cell membrane are often called a fluid mosaic. What does this mean?
6. Besides phospholipids, cell membranes contain carbohydrates. What is their function?
7. Proteins which penetrate the membrane are called ____________________ proteins.
8. Proteins on the surface of the membrane are called ___________________ proteins.
9. 5 functions of membrane proteins include:
a.
d.
b.
e.
c.
Correctly color code and identify the name for each part of the cell membrane.
Letter
_____
_____
_____
Name/Color
Phospholipid bilayer (no color)
Integral protein (pink)
Fatty acid tails (orange)
Letter
_____
Name/Color
Peripheral protein (red)
_____
_____
Phosphate heads (yellow)
_____
Glycoprotein complex
(green)
Carbohydrate marker
(purple)
Per:
Passive and Active transport
10. What process do cells use to transport water across the membrane, using no additional energy?
11. By what process do oxygen and carbon dioxide move into and out of cells?
12. Explain how oxygen travels from the atmosphere into the bloodstream and how carbon dioxide travels out of the
blood stream back into the atmosphere. Be sure to mention the names of the processes. These diagrams may
help you.
Lung
Put a circle around the number next to the statement(s) that applies to simple diffusion. Put a star next to the
statement(s) that refer(s) to facilitated diffusion. Some statements may have both symbols.
13. Particles move through cell membranes without the use of energy by cells.
14. Particles tend to move from high concentration to lower concentration.
15. Particles move within channel proteins that pass through cell membranes.
16. Particles move across membranes using energy against the concentration gradient
17. This process uses passive transport and therefore, no additional energy.
Matching: Circle whether the term on the left refers to active transport or passive transport
18. Sodium Potassium Pump
Active transport
Passive Transport
19. Osmosis
Active transport
Passive Transport
20. Phagocytosis
Active transport
Passive Transport
21. Exocytosis
Active transport
Passive Transport
22. Simple Diffusion
Active transport
Passive Transport
23. Facilitated diffusion
Active transport
Passive Transport
24. Endocytosis
Active transport
Passive Transport
25. Contractile vacuole
Active transport
Passive Transport
26. Ion channels
Active transport
Passive transport
27. What is the source of energy used in active transport?
28. Explain the relationships among active transport, passive transport and homeostasis in living things.
29. Draw a cartoon showing the process of endocytosis.
30. Draw a cartoon showing the process of exocytosis
31. When a nerve cell is at resting potential, the sodium potassium pump is pushing 3 Na ions _____________ of the
cell and 2 Potassium ions ___________ the cell. This sets up an electrical charge across the membrane.
32. Draw part of a nerve cell membrane at resting potential. Be sure to indicate the inside and outside of the cell.
33. When a nerve is stimulated, sodium channels briefly open and sodium ions are able move into the cell with the
concentration gradient. This reverses the membrane charge for just a moment. Draw part of a nerve cell
membrane in action potential.