Calcium, phosphorus, and magnesium all have which of the following in common?
A. They all exist in circulation as only free or ionized forms.
B. They all exist as free or ionized forms, bound to proteins and complexes to radicals to form salts.
C. Calcium exist as bound and free only, phosphorus exits only as bound and complexes to radical to form salts and magnesium exists as free or ionized forms, bound to proteins and complexes to radicals to form salts.
D. Calcium blood levels are regulated by parathyroid hormones, phosphorus is regulated by testosterone, and magnesium is regulated by insulin.
B
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Operating system software is the basic software that allows the computer to run.
Answer the following statement true (T) or false (F)
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