Compared with the interstitial fluid that bathes active muscle cells, blood reaching these cells in arterioles has a
A) higher PO₂.
B) higher PCO₂.
C) greater bicarbonate concentration.
D) lower pH.

Question

Quizplus · Accepted Answer

Arterioles deliver oxygen-rich blood to active muscle cells, which increases the concentration of oxygen in the interstitial fluid around these cells. Therefore, compared to interstitial fluid, blood reaching these cells in arterioles has a higher PO₂ (partial pressure of oxygen).

Compared with the Interstitial Fluid That Bathes Active Muscle Cells