How can one have an imbalance in a substance, but not actually have elevated or deficient levels of that substance in the body?

How can one have an imbalance in a substance, but not actually have elevated or deficient levels of that substance in the body? Without having an absolute excess or deficiency of a substance, one can have too much or too little of that substance in a given compartment. Such a relative increase or decrease is due to a redistribution of water or the ion in the body’s compartments.

Explanation:

explanation:

for  example, forests have higher evapotranspiration than other ecosystems,  such  as grasslands, because of their deeper roots and greater leaf area. thus forests have a net moistening effect on the atmosphere and become a moisture source for downwind ecosystems.

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explanation: