Question

question 11
why does carbon dioxide diffuse from the blood into the alveoli?
when oxygen leaves the blood, another gas must replace it
concentration of carbon dioxide is higher in the blood than in the alveoli
the brain signals the alveoli to absorb carbon dioxide
there is not enough hemoglobin to carry the carbon dioxide

Explanation:

Gas diffusion occurs based on concentration gradients. Carbon - dioxide diffuses from an area of higher concentration (blood) to an area of lower concentration (alveoli) during the process of respiration.

Answer:

concentration of carbon dioxide is higher in the blood than in the alveoli