What is the main effect of an asphyxiant?

Answer: C — To prevent oxygen from effectively reaching body tissues

The main effect of an asphyxiant is to prevent oxygen from effectively reaching body tissues. Asphyxiants, whether they are chemical agents or gases like carbon dioxide or nitrogen, interfere with the body's ability to transport or utilize oxygen. When oxygen is insufficient, cells cannot perform their necessary functions, leading to hypoxia, a condition where tissues do not receive adequate oxygen. This can result in various physiological disturbances, often manifesting as dizziness, loss of consciousness, and even organ failure if exposure is prolonged or severe. Understanding the role of asphyxiants is crucial for recognizing the signs of exposure and implementing appropriate safety measures in hazardous environments.