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  4. Which is the principal cation in the plasma of the blood?

Q. Which is the principal cation in the plasma of the blood?

 2978  221 AIPMTAIPMT 1999Body Fluids and Circulation Report Error

Solution:

Blood consists of a watery fluid called plasma. Plasma is a faint yellow, slightly alkaline, viscous fluid. It consists of 90% water, 1% inorganic salts, 7% or 8% proteins and 1% of other substances. The inorganic salts in plasma occur as ions. Sodium is the main cation of plasma and chloride, the main anion. Potassium, calcium and magnesium occur in small amount.