31. The dominant cation in the blood plasma (extracellular fluid) is
[1999]
(a) potassium
(b) calcium
(c) magnesium
(d) sodium
Show Answer
Solution:
(d) $Na^{+}, Cl^{-}$and $HCO_3^{-}$are the electrolytes present in blood plasma. $Na^{+}$and $Cl^{-}$helps in maintainence of osmotic pressure and fluid balance.
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