If extracellular fluid osmolality is 385 mOsm/kg,the kidneys will increase reabsorption of
A)urea.
B)water.
C)sodium.
D)potassium.
E)chloride.

Question

Quizplus · Accepted Answer

When extracellular fluid osmolality is high, it indicates a state of dehydration or high concentration of solutes outside the cell. In order to maintain homeostasis, the kidneys will increase reabsorption of water to dilute the solutes and bring the osmolality back to normal. Urea, sodium, potassium, and chloride may also be affected by changes in osmolality, but their reabsorption or excretion is not as directly related to water balance as water reabsorption is.

If Extracellular Fluid Osmolality Is 385 MOsm/kg,the Kidneys Will Increase