Calcium present in body fluids performs all of the following roles except:
A. maintaining high blood pressure
B. facilitating muscle contraction
C. regulating the transport of ions across cell membranes
D. participating in blood clotting
E. activating cellular enzymes

The answer is A. maintaining high blood pressure.

Explanation:

There is usually 1% of our total calcium in the body present in the body fluids. The calcium in the fluids plays important roles for a number of functions, including transmission of nerve impulses (C. ions transportation), muscle contraction (B.), blood clotting (D.), stability of cell membranes (C.), and cell metabolism (E. activate enzymes).

Therefore, A should be the most suitable for the answer.

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explanation: