What is a direct consequence of inhaling toxic gases?

Inhaling toxic gases has a profound impact on respiratory health, making impaired lung function a direct consequence. When toxic gases are inhaled, they can cause immediate damage to the lung tissues and airways, leading to conditions such as chemical pneumonitis, pulmonary edema, and reduced oxygen exchange. This impairment can manifest as difficulty breathing, decreased ability to exert oneself physically, and long-term respiratory issues.

The other options relate to different health concerns that may not be directly associated with the act of inhaling toxic gases. For example, muscle cramps typically result from physiological stress, dehydration, or electrolyte imbalances, while vision impairment and cognitive issues like amnesia can be linked to different types of injury or exposure but are not the primary effects of inhaling harmful fumes. Thus, impaired lung function stands out as the most immediate and relevant consequence of such exposure.