Download Crossing The Membrane Worksheet

Crossing The Membrane Worksheet
Name ______________________________
Answer each question using a complete sentence.
1. What are three methods of crossing the cell membrane require no work/energy?
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2. What is a concentration gradient?
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3. When does diffusion stop?
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4.
A cell already has a high concentration of sodium ions in its cytoplasm. What method of transport can it use to
pump even more sodium ions inward? ______________________________________
5.
Sketch a white blood cell performing endocytosis to destroy a salmonella bacterium. Make three panels, one
before, one during, and one after.
6.
Sketch a salivary gland cell secreting vesicles of saliva into the environment using exocytosis. Make three panels,
one before, one during, and one after.
7. Explain how carrier proteins function during facilitated diffusion.
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8. Explain how carrier proteins function during active transport.
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9. What is the difference between diffusion and osmosis?
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10. Explain how the cell membrane is semipermeable.
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11. Explain how a diffusion gradient allows a dog to follow a scent-trail to catch an animal.
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