Q.

The most abundant extracellular cation is

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a

Na+

b

K+

c

Ca2+

d

H+

answer is A.

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Detailed Solution

The principal cation in the ECF is Na+. The principal cation in the cytosol is K+. The principal anion in the ECF is Cl–. The principal anions in the cytosol are sulphates, phosphates, proteins and other non-diffusible anions.
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