Question

Which is the principal mineral cation in the extracellular fluid?

Answer 1

Hint: Extracellular fluid is the fluid that exists in an organism outside of the cells of the organism but within the body cavity and vessels. Blood plasma is the extracellular fluid that travels in the circulatory system which is the liquid component of the blood.

Complete answer:
There are electrolyte substances that dissociate in solution and have ability to conduct an electric current. These electrolyte substances are located in extracellular as well as intracellular fluid of the body. In the extracellular fluid the principal mineral cation is sodium and the major anion is chloride. These two minerals help to make communication between muscles and nervous systems through an electric current. The final extracellular fluid is transcellular fluid which exists in many of the spaces in which fluid works as structural support not for the exchange of molecules. Extracellular fluid is found in the eyes, joints and cerebrospinal fluid.
Intracellular fluid is the fluid that exists inside the cells of an organism. The major cation in the intracellular fluid is potassium. Intracellular fluid is also known as cytosol. It is fluid that contains nutrients, proteins, and other molecules in the cell. The cytosol along with the cell organelles is called cytoplasm.

Note:
An electrolyte is defined as any molecule that separates into ionic components in the solution and is responsible for conducting an electric current. Cations move towards the negative pole and anions move towards the positive pole of an electric field.