The movement of O₂ and CO₂ between the blood in the tissue capillaries and the cells in tissues depends most directly upon

Question

Quizplus · Accepted Answer

The movement of gases, such as O₂ and CO₂, between the blood in the tissue capillaries and the cells in tissues occurs through diffusion down a partial pressure gradient. This means that the concentration of these gases is higher in the blood than in the cells, and they move from an area of higher concentration (in the blood) to an area of lower concentration (in the cells) until equilibrium is reached. This process is facilitated by the partial pressure differences between the blood and the cells. Active transport and osmosis do not play a significant role in the movement of these gases. Total atmospheric pressure differences may affect gas exchange, but this is not the primary mechanism.

The Movement of O2 and CO2 Between the Blood in the Tissue

The Movement of O₂ and CO₂ Between the Blood in the Tissue