Water movement between the ICF and ECF compartments is determined by:
a. osmotic forces.
b. plasma oncotic pressure.
c. antidiuretic hormone.
d. buffer systems.
ANS: A
Osmotic forces determine water movement between the ECF and ICF compartments.
Oncotic pressure pulls water at the end of the capillary, which makes it move between intra and extra as interstitial is considered extra. The antidiuretic hormone regulates water balance, which would make water move between the intra- and extracellular spaces. Buffer systems help regulate acid balance.
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