Q.

The most abundant extracellular cation is

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a

Mg2+

b

Na+

c

K+

d

Ca2+

answer is A.

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Detailed Solution

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Na+ is the most abundant cation while Cl- is the most abundant anion in the extracellular fluid. The concentration of Na+ in the ECF is 10 times to its concentration in the cytosol.

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