Essential idea: Membranes control the composition of cells by active and passive transport. | |||||||||||||||||||||
This diagram is of the cell membrane and these questions relate to movement across the membrane. |
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1. Which of the following most accurately describes the permeability of the cell membrane?
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2. Which of the following is not a method by which particles can move across membranes?
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3. The fluidity of membranes aids which method of transport?
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4. Which process is described in the following list of events? Vesicle buds off from Golgi Apparatus
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5. What is essential for diffusion to occur across the membrane of a red blood cell?
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6. Hydrocarbon tails of phospholipids are in the centre of the membrane. Which of the following rows is correct?
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7. Magnesium ions cannot pass through a plasma membrane by simple diffusion. Instead they pass through narrow channels in a process called facilitated diffusion. The walls of the channels consist of ...
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8. What are the missing words in this passage?. Osmosis is the ___X__movement of water molecules from a region of ___Y__solute concentration to a region of ___Z___solute concentration through the plasma membrane. |
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9. A cell, X, was placed into a solution containing a dye. After two hours the concentration of the dye inside cell X was higher than in the solution. This was repeated with an identical cell, Y, in the presence of a substance that inhibits ATP. What would be the expected outcome two hours later in cell Y?
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10. Active transport is carried out by which type of molecule in the membrane?
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