If plasma volume is below normal, the changes originated by the kidneys will be able to return the plasma osmolarity back to normal.

Question

Quizplus · Accepted Answer

The kidneys can adjust plasma volume by retaining or excreting water and solutes, but if the plasma volume is below normal, simply adjusting osmolarity does not directly correct the volume deficit. Restoration of plasma volume often requires intake or administration of fluids.

If Plasma Volume Is Below Normal, the Changes Originated by the Kidneys