When water is lost but electrolytes are retained,
A) the osmolarity of the ECF falls.
B) osmosis moves water from the ICF to the ECF.
C) both the ECF and the ICF become more dilute.
D) there is an increase in the volume of the ICF.
E) all of the above

Question

Quizplus · Accepted Answer

When water is lost but electrolytes are retained, the osmolarity of the ECF rises. This draws water from the ICF to the ECF through osmosis, leading to dehydration of the cells. As a result, the ICF becomes more concentrated, not more dilute. There is no increase in the volume of the ICF either. Therefore, B is the best choice.

When Water Is Lost but Electrolytes Are Retained