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Active Transport Quiz 1. True or False: Active transport requires ATP. 2. True or False: Active transport can be considered the opposite of diffusion. 3. Define active transport. 4. What is the sodium-potassium pump? 5. What type of protein is required for active transport? 6. Which statement is true concerning the sodium-potassium pump? a) The pump moves sodium ions out of the cell and potassium ions into the cell. b) The pump moves sodium ions into the cell and potassium ions out of the cell. c) The pump moves both sodium and potassium ions out of the cell. d) The pump moves both sodium and potassium ions into the cell. 7. Which statement is true concerning active transport? a) During active transport, molecules move from an area of high concentration to an area of low concentration. b) During active transport, molecules move from an area of low concentration to an area of high concentration. c) Active transport is called "active" because it involves a protein pump. d) Active transport is called "active" because it involves an active channel protein. 8. Your nerve cells pump sodium ions from the extracellular space into the cell. How do the sodium ions get back out of the cell? a) by active transport b) by simple diffusion c) by facilitated diffusion d) all of the above 9. Complete the following sentence. As molecules are moving against their concentration gradients, active transport cannot occur without __________. a) a channel protein b) a carrier protein c) the sodium-potassium pump d) facilitated diffusion 10. Why are active transport proteins referred to as pumps? a) Because they release energy into the cell. b) Because they move molecules across the membrane. c) Because they use energy to pump the molecules against their concentration gradient. d) all of the above