What effect does the sympathetic nervous system have on the bronchial glands?

The sympathetic nervous system stimulates the bronchial glands to reduce mucus secretion and promote bronchodilation. This response is mediated by the release of norepinephrine, which acts on beta-adrenergic receptors in the bronchial tissues. As a result, air passages widen, facilitating increased airflow and reducing congestion during stress or physical activity. This mechanism helps optimize respiratory function in situations requiring heightened alertness or physical exertion.