FAA Ground School Practice Test

What happens in the human body with large accumulations of carbon monoxide?

1. Enhanced muscular power

2. Loss of muscular power

3. Increased oxygen carrying capacity

4. Inhibition of carbon dioxide production

The correct answer is: Loss of muscular power

When large accumulations of carbon monoxide enter the human body, they bind to hemoglobin in the blood much more effectively than oxygen does. This prevents hemoglobin from carrying oxygen to vital organs and tissues, leading to a condition known as hypoxia, where there is insufficient oxygen available for cellular processes. As a result, the body's ability to produce energy and maintain muscular power is significantly impaired, resulting in loss of muscular power. This situation can lead to symptoms such as weakness, confusion, and potentially loss of consciousness if not addressed. On the contrary, enhanced muscular power, increased oxygen carrying capacity, and inhibition of carbon dioxide production do not occur due to the presence of carbon monoxide. Instead, carbon monoxide reduces the oxygen transport capability of the blood, which directly impacts muscle function and energy production negatively.