Exchange Between the Two Main Subdivisions of ECF Occurs Primarily

Question

Exchange between the two main subdivisions of ECF occurs primarily at the
A) veins.
B) muscles.
C) tissues.
D) capillaries.
E) arteries.

Accepted Answer

The exchange between the two main subdivisions of ECF (extracellular fluid) occurs primarily at the capillaries, as these are the smallest blood vessels where exchange of nutrients, gases, and waste products occurs between the blood and tissues. The other options (veins, muscles, tissues, and arteries) are not directly involved in the exchange between the two main subdivisions of ECF.