Question

What best describes why the partial pressures are the same both in the blood and in the interstitial fluids at "E"?

A. blood has absorbed all the H+ possible by then
B. tissues have absorbed all the H+ possible at that location
C. the concentration gradient is growing
D. the concentration gradient is at equilibrium
E. none of these

Answer 1

The partial pressures are the same both in the blood and in the interstitial fluids at point E because the concentration gradient is at equilibrium.

Step-by-step explanation:

Partial pressures in blood and interstitial fluids refer to the pressure exerted by a specific gas within a mixture of gases. The partial pressure of a gas is proportional to its concentration in the mixture. In the context of the respiratory and circulatory systems, oxygen (O2) and carbon dioxide (CO2) are the primary gases of interest.

At point E, the partial pressures are the same both in the blood and in the interstitial fluids because the concentration gradient is at equilibrium.