During which sequence are the vocal cords closed when a person coughs due to laryngeal irritation?

During a cough reflex, the vocal cords initially close to build up pressure in the lungs, which is a crucial part of the coughing mechanism. When the larynx (where the vocal cords are located) is irritated, the body responds by closing the vocal cords to prevent air from escaping. This closure allows for a rapid buildup of air pressure behind the closed vocal cords. Once sufficient pressure is achieved, the vocal cords open suddenly, and the person expels air forcefully, resulting in a cough that helps clear irritants from the airway.

This sequence highlights the importance of the vocal cord closure not just during the cough itself, but as a preparatory step immediately preceding the cough to facilitate efficient expulsion of irritants.