During swallowing and coughing, the vocal cords move in which sequence?

• A. Open, Open, Closed
• B. Closed during swallowing; Closed after irritation; Open during coughing
• C. Closed, Open, Closed
• D. Open during swallowing; Open after irritation; Closed during coughing

Answer: (B)

Vocal cords (true vocal folds) move to protect the airway and to regulate airflow during activities like swallowing and coughing. During swallowing, the larynx rises and the vocal cords adduct to close the glottis, with the epiglottis helping seal off the airway. When a cough is triggered by airway irritation, the glottis closes again to trap air and build up intrathoracic pressure. Then, the glottis opens rapidly to allow a strong expiratory burst that expels the irritant. So the sequence is: closed during swallowing; closed after irritation (during the cough reflex buildup); open during coughing (in the expulsive phase).