True Na-K+ pumps are active forms of transport Na-K+ pumps consume about half of your daily energy expenditure Na-K+ pumps move 2 molecules of K+ toward the ICF per cycle Na-K+ pumps are enzymes that hydrolyze ATP into ADP and Pi False Na-K+ pumps move 3 molecules of sodium to the ICF per cycle Na-K+ pumps move sodium down its concentration gradient Use of the term "pump" refers to moving solutes down their respective concentration gradients After death, Na-K+ pumps can continue to function indefinitely
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Sodium-potassium pumps maintain an electrochemical gradient. True False Since sodium-potassium pumps transport sodium ions out of a cell and potassium ions into a cell, what type of carrier proteins are they? a. symporters b. uniporters c. ABC transporter d. antiporters e. ion pumps INHIBITION OF THE SODIUM-POTASSIUM ATPase PUMP CAUSES WHICH OF THE FOLLOWING? a. INCREASED EXTRACELLULAR CALCIUM b. INCREASED INTRACELLULAR SODIUM c. INCREASED EXTRACELLULAR SODIUM d. NONE OF THE ABOVE WHICH OF THE FOLLOWING PHARMACEUTICAL AGENTS INHIBITS THE SODIUM-POTASSIUM ATPase PUMP? a. LASIX b. DIGOXIN c. A DERIVATIVE OF THE FOXGLOVE PLANT d. MORE THAN ONE OF THE ABOVE ANSWERS IS TRUE
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All of the following correctly describe the sodium-potassium pump EXCEPT: a. A total of five binding sites are present in the sodium-potassium pump b. Energy is required for the process to take place c. Potassium ions are pumped into the cell, where they are present in lower concentration than the extracellular fluid d. Molecules are pumped from low concentration to high concentration e. The transport proteins will undergo some conformational changes
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