Question

If the partial pressure of oxygen is 40mmHg in the interstitial fluid of muscle tissue of your leg and 95mmHg in the blood of the arterial end of the capillary bed associated with that muscle, which way will oxygen diffuse?

into the interstitial fluid
- high to low

Answer 1

Correct, oxygen will diffuse into the interstitial fluid from the blood due to the concentration gradient (higher concentration in the blood compared to the interstitial fluid).