What are the fluid compartment consequences of isotonic dehydration?
A. ECF compartment volume contracts, ICF volume contracts
B. ECF compartment volume contracts, ICF volume remains the same
C. ECF compartment volume expands, ICF volume contracts
D. ECF compartment volume expands, ICF volume remains the same
B
Isotonic dehydration involves loss of isotonic fluids from the extracellular fluid (ECF) space, in-cluding both the plasma and interstitial spaces. Thus, there is a loss of water and electrolytes in equal proportions. Because isotonic fluid is lost, ECF osmolarity remains normal while volume is reduced. This type of dehydration does not cause a shift of fluids between spaces, so the intra-cellular fluid (ICF) volume remains normal.
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