Question

Which of the following is not true, about the extracellular fluids?

• A. The extracellular fluid has a very low concentration of sodium.
• B. Extracellular fluid is the fluid present outside the cells.
• C. Chemical compositions of plasma and Interstitial fluids are similar
• D. The concentration of calcium is high in this fluid which is useful for muscle contraction.

Answer 1

The correct option is A

The extracellular fluid has a very low concentration of sodium.

Extracellular fluid differs from intracellular fluid (fluid within the cells) in that it generally has a high concentration of sodium and low concentration of potassium, while intracellular fluid is high in potassium and low in sodium.