The partial pressure of carbon dioxide in the cells of peripheral tissues is approximately ________ mm Hg.

Question

Quizplus · Accepted Answer

The partial pressure of carbon dioxide in the cells of peripheral tissues is approximately 45 mm Hg. This is because cellular respiration generates carbon dioxide as a waste product, which diffuses out of the cells and into the blood, where it combines with hemoglobin to form carbaminohemoglobin or is carried as dissolved CO2. The partial pressure of CO2 in arterial blood is around 40 mm Hg, and it increases to around 45 mm Hg as blood reaches the capillaries of peripheral tissues. This partial pressure gradient facilitates the diffusion of CO2 out of the cells and into the blood for transport back to the lungs for elimination.

The Partial Pressure of Carbon Dioxide in the Cells of Peripheral