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Q. |
Which of the metallic ions is essential for blood clotting? |
A. | Na+ |
B. | Ca++ |
C. | K+ |
D. | Fe++ |
Answer» B. Ca++ | |
Explanation: Clotting also requires: calcium ions (Ca2+)(which is why blood banks use a chelating agent to bind the calcium in donated blood so the blood will not clot in the bag). about a dozen other protein clotting factors. |
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