★ Circulation and Excretion Quiz
Most of the carbon dioxide produced by humans
A. converted to bicarbonate ions by and enzyme on the RBC
B. bound to hemoglobin
C. simply dissolved in the plasma
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If you cut yourself and apply pressure to the cut for several minutes and it is still bleeding, what could be wrong?
A. mast cells are not releasing the chemical messengers
B. platelets are not working properly
C. hemoglobin levels are too high
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