Q. What is the principal cation in human blood?

A) Potassium
B) Sodium
C) Calcium
D) Manganese
Explanation

The main inorganic constitutents of blood plasma are chloride and bicarbonate salts of sodium (principal cation). Traces of some other salts like phosphates, bicarbonates, sulphates and iodides of calcium, magnesium and potassium are also found.

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.