What poisonous gas is exhaled when we breath?

What poisonous gas is exhaled when we breath?

• A. Oxygen
• B. Methane
• C. Carbon Dioxide (CO2)
• D. Nitrogen

Answer: (C)

When your body uses oxygen to make energy, carbon dioxide is produced as a waste product and must be removed. That waste gas travels to the lungs and is exhaled. Among the options, carbon dioxide is the gas your breath primarily releases as a result of metabolism, which is why it’s the correct choice. Oxygen is what you take in, not what you exhale as waste. Methane isn’t produced in normal human respiration, and nitrogen, while abundant in air, is largely inert in the lungs and not exhaled as a toxic gas.

When your body uses oxygen to make energy, carbon dioxide is produced as a waste product and must be removed. That waste gas travels to the lungs and is exhaled. Among the options, carbon dioxide is the gas your breath primarily releases as a result of metabolism, which is why it’s the correct choice. Oxygen is what you take in, not what you exhale as waste. Methane isn’t produced in normal human respiration, and nitrogen, while abundant in air, is largely inert in the lungs and not exhaled as a toxic gas.