Membrane_Transport_Study_Questions

Membrane_Transport_Study_Questions - Membrane Transport...

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Membrane Transport Study Questions (Select the single BEST answer) 1. Which of the following is correctly matched? A) ions – dissolve in the bilayer and diffuse through the cell membrane B) nonpolar molecules – use channels to move through the cell membrane C) large polar molecules – dissolve in the bilayer and diffuse through the cell membrane D) large nonpolar molecules – use carriers to move through the cell membrane E) large polar molecules – use carriers to move through the cell membrane 2. Which of the following is correctly matched? A) proteins – hydrophobic tails, hydrophilic heads; phospholipids – carriers, enzymes; carbohydrate – between phospholipid molecules B) carbohydrate – bilayer, framework of the cell membrane; proteins – carriers, enzymes, receptors; cholesterol – between phospholipid molecules C) cholesterol – carriers, enzymes; carbohydrate – bilayer, framework of cell membrane; proteins- outer surface, cell type identification; phospholipid – between carbohydrate molecules D) phospholipid molecules – bilayer, framework of the cell membrane; proteins – carriers, enzymes, receptors; carbohydrate – outer surface, cell type identification; cholesterol – between phospholipid molecules 3. In order for molecules (like O 2 ) to diffuse through the cell membrane, the cell is required to use its own energy in the form of ATP. A) true B) false 4. Carrier mediated transport down a concentration gradient is called A) active transport B) facilitated diffusion C) both A and B D) neither A nor B 5. Osmosis requires a ___________ membrane and solute concentrations ________________ on the two sides of the membrane. A) permeable, the same B) semipermeable, the same C) semipermeable, different D) permeable, different 6. Which of the following affects the movement of electrolytes through cell membranes? A) electrical gradient B) concentration gradient C) both A and B D) neither A nor B 7. After T m (transport maximum) for a molecule is reached, an increase in the molecule’s concentration outside the cell __________ increase the rate of movement of the molecule into the cell. A) will B) will not 8. Competition, saturation, and specificity occur in active transport, but not facilitated diffusion. A) true B) false Use the graphs below to answer Question #9. Graph A Graph B Rate of Transport Rate of Transport of molecule into cell of molecule into cell Concentration of Concentration of molecule in ECF molecule in ECF
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(Low) (High) (Low) (High) 9. In which graph above is the molecule transported by simple diffusion? A) Graph A B) Graph B C) both graphs D) neither graph 10. If a cell is placed in a hypertonic solution, it will
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This note was uploaded on 03/18/2008 for the course PSL 250 taught by Professor Denison during the Spring '08 term at Michigan State University.

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Membrane_Transport_Study_Questions - Membrane Transport...

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