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| Q. |
Regarding the “iodide pump” in thyroid cells, which is NOT true? |
| A. | it is stimulated by TSH |
| B. | it depends on Na+ / K+ ATPase activity |
| C. | it pumps iodide into the colloid, after entering the cell down an electrical gradient |
| D. | it pumps iodide against an electrical gradient |
| E. | its activity can be measured with trace doses of radioactive iodine |
| Answer» C. it pumps iodide into the colloid, after entering the cell down an electrical gradient | |
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