Which of the following is NOT a sign of bronchoconstriction?

Drowsiness is not a sign of bronchoconstriction. Bronchoconstriction refers to the narrowing of the airways in the lungs, which typically leads to more direct respiratory symptoms. These symptoms are attributed to the body's response to decreased airflow, resulting in increased work of breathing and air turbulence.

Coughing is a common reflex that occurs as the body tries to clear the airways; it can be a response to the irritation caused by constricted bronchi. Dyspnea, or difficulty breathing, is a hallmark of bronchoconstriction, as it results in inadequate airflow and oxygenation. Wheezing is another characteristic sign, often described as a high-pitched sound produced during exhalation, reflecting the narrowed air passages.

Drowsiness does not directly reflect the respiratory distress associated with bronchoconstriction and may point to other issues, such as compromised oxygenation due to prolonged periods of hypoxia or other systemic problems. Therefore, it stands apart from the more commonly recognized respiratory symptoms linked to bronchoconstriction.