試題詳解

14. The physiologist J. Soum surgically sealed off an air sac of a pigeon and injected carbon monoxide into it. What did he observe and conclude from this experiment?
(A) The bird died demonstrating the toxicity of this gas.
(B) The bird was fine, demonstrating this gas is not actually toxic.
(C) The bird died, indicating diffusion of gases across the air sac into the blood.
(D) The bird showed no ill effects, indicating diffusion of gases from the air sac into the blood.
(E) The bird showed no ill effects, indicating gases do not diffuse from the air sac into the blood.