Final answer:
The administration of 100 percent oxygen helps displace carbon monoxide from hemoglobin and restore oxygen supply. Carbon dioxide cannot bind to hemoglobin as strongly as oxygen or carbon monoxide.
Step-by-step explanation:
The administration of 100 percent oxygen saves a patient from carbon monoxide poisoning because carbon monoxide binds to hemoglobin in red blood cells more strongly than oxygen does. When a person is exposed to carbon monoxide, it replaces oxygen in the blood, leading to a decrease in oxygen supply to the body's tissues. By giving 100 percent oxygen, it helps to displace carbon monoxide from hemoglobin and restore the oxygen supply.
Giving carbon dioxide would not work because carbon dioxide does not have the ability to bind to hemoglobin as strongly as oxygen or carbon monoxide. Additionally, carbon dioxide is a waste product of cellular respiration and is naturally produced by the body. It is not a suitable substitute for oxygen.