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Which of the following is the dominant intracellular ion?
(A)Potassium
(B)Chloride
(C)Phosphate
(D)Calcium

Answer
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Hint The dominant intracellular ion among the above options is that chemical element with the symbol ‘K’ and atomic number 19. It is a metal that is silvery-white in color and is soft enough to be cut with a knife with little force.

Complete answer:
Potassium is the dominant intracellular ion. There are many ions present in the extracellular and intracellular fluid. The major ions which are found in the human body are sodium, potassium, calcium, magnesium, phosphate, and chloride. Potassium is known to be the major intracellular ion and sodium and chloride are major extracellular ions. The potassium is found to be helpful in the regulation of fluid levels within the cell and in maintaining the pH balance within the body.

Additional Information:
The difference which is seen between extracellular and intercellular is that the extracellular ion is found outside of a cell, on the other hand, the intercellular is found between cells, or connecting cells. Electrolytes are known as the substances that dissociate in solution and have the power to conduct an electrical current. These substances are located within the extracellular and liquid body substance. Within the ECF, the main cation is sodium, and therefore the major anion is chloride. The main cation within the liquid body substance is potassium. These electrolytes play a crucial role in maintaining homeostasis. During this article, the etiology, signs, symptoms, and coverings for imbalances of those three electrolytes are reviewed.

So, the correct answer is ‘Potassium’.

Note: An ion is a charged atom or molecule.The ion is charged because the number of electrons do not equal the number of protons in the atom or molecule. An atom can have a positive charge or a negative charge , which will be depending on whether the number of electrons in an atom is greater or less than the number of protons in the atom.