Question

which of the following terms refer to the fluid that surrounds the cells?
□ cytoplasm
□ interstitial fluid
□ extracellular fluid
□ cytosol

Explanation:

• Cytoplasm: It is the fluid inside the cell (cytosol + organelles), not surrounding cells. Eliminate.
• Interstitial fluid: It is the fluid that surrounds cells in tissues, part of extracellular fluid. Correct.
• Extracellular fluid: This is the fluid outside of cells, which includes interstitial fluid, plasma, etc. So it also refers to fluid surrounding cells. Correct.
• Cytosol: It is the liquid part of the cytoplasm inside the cell, not surrounding cells. Eliminate.

Answer:

B. Interstitial fluid, C. Extracellular fluid