Biology: A Guide to the Natural World

Chapter 5: Life’s Border: The Plasma Membrane

Post-quiz: Passive and active transport

1. If a plant cell contains more solutes than its surrounding environment: [Hint]

2. When two solutions that differ in solute concentration are placed on either side of a semi-permeable membrane and osmosis is allowed to occur, which of the following will happen? [Hint]

3. The concentration of calcium in a cell is 0.3%. The concentration of calcium in the fluids surrounding the cell is 0.1%. How could the cell obtain more calcium? [Hint]

4. Which of the following pieces of evidence would suggest that a substance entered a cell via active transport as opposed to passive transport? [Hint]

5. Which statement is correct concerning the sodium-potassium pump? [Hint]

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