Where is most of the Mg2+ found in the body?
a. Bound to phosphate
b. Bound to proteins
c. In the cells
d. Ionized
ANS: C
Most (99%) of the magnesium in the body is intracellular. Of the small portion in extracellular spaces, 80% is ionized or bound to other ions (e.g., phosphate) with the remaining 20% bound to proteins.
Health Professions
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