Which of the following is a consequence of inhaling smoke?

Inhaling smoke can cause thermal burns to the airway, which is a significant concern during a fire or smoke-filled environment. When smoke is inhaled, the high temperatures and harmful substances present can lead to inflammation, swelling, and damage to the mucosal lining of the respiratory tract. This can result in serious complications such as airway obstruction, respiratory distress, or even respiratory failure. The airway is particularly vulnerable because it is not only exposed to the heat but also to various toxic byproducts of combustion, which can cause chemical burns in addition to thermal burns.

Improved lung function, reduced heart rate, and increased oxygen saturation are not outcomes associated with smoke inhalation. Instead, smoke exposure typically results in detrimental effects on the respiratory and cardiovascular systems, leading to decreased lung function, elevated heart rates due to stress and respiratory compromise, and lowered oxygen saturation as the body struggles to effectively oxygenate the blood. Therefore, thermal burns to the airway is the correct answer because it directly addresses a serious consequence of smoke inhalation.