What is one of the effects of sulfur dioxide exposure on the respiratory system?

One of the effects of sulfur dioxide exposure on the respiratory system is shortness of breath. Sulfur dioxide is a toxic gas that, when inhaled, can irritate the airways and lead to bronchoconstriction. This can result in difficulty breathing, particularly for individuals with preexisting respiratory conditions such as asthma or chronic obstructive pulmonary disease (COPD). The inflammatory response triggered by sulfur dioxide can cause swelling and mucus production in the respiratory passages, further obstructing airflow and leading to a sensation of breathlessness.

In contrast, the other choices do not accurately represent the effects of sulfur dioxide exposure. Increased stamina and enhanced oxygen transfer are not realistic outcomes, as exposure to this gas typically impairs respiratory function rather than improving it. Similarly, reduced fatigue would generally not occur due to the adverse effects on lung function that sulfur dioxide exposure induces.