When red blood cells transport respiratory gases
- both oxygen and carbon dioxide combine to the globin portion.
- carbon dioxide binds to the heme portion and oxygen binds to the globin portion.
- both oxygen and carbon dioxide combine to the heme portion.
- oxygen binds to the heme portion while carbon dioxide binds to the globin portion.
Answer: oxygen binds to the heme portion while carbon dioxide binds to the globin portion.