Final answer:
The three major compartments that contain fluid in the body are intracellular fluid, extracellular fluid, and plasma. The body maintains homeostasis by shifting fluid between these compartments. Sodium and potassium are the major electrolytes responsible for shifting fluid between compartments.
Step-by-step explanation:
The 3 major compartments that contain fluid in the body are intracellular fluid, extracellular fluid, and plasma. The body maintains a state of homeostasis by shifting fluid between these three compartments. The major electrolytes responsible for shifting fluid between compartments are sodium and potassium. An increase in sodium intake can result in fluid retention. While a dry mouth is a symptom of dehydration.