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A cation that is more abundant as a solute in the cytosol of a neuron than it is in the interstitial fluid outside the neuron is A) HCO3-. B) Cl-. C) Ca++. D) Na+. E) K+.

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Mayg21

Answer: E) K+

Explanation:

The major cation in the intracellular fluid or cytosol is potassium (K+).

Within the interstitial fluid, the major cation is sodium(Na+) and the major anion is chloride(Cl-).

They all play an important role in maintaining homeostasis(the ability to maintain a relatively stable internal state that persists despite changes in the world outside).