Airway obstruction due to the tongue falling back is a result of relaxation in which muscle?

The correct choice highlights the role of the genioglossus muscle in preventing airway obstruction. The genioglossus is a prominent muscle of the tongue that plays a crucial role in its positioning and movement. When a person is in a supine position or when they become sedated, relaxation of the genioglossus muscle can allow the tongue to fall back towards the oropharynx. This movement can lead to blocking the airway, resulting in breathing difficulties, especially in situations like sleep apnea.

Understanding the function of the genioglossus is essential, as it serves to keep the airway clear by protruding the tongue forward during active states, thus preventing airway obstruction. Other muscles mentioned have different functions or positions in the context of tongue movement and airway management, making them less significant in this particular scenario concerning obstructive airway issues.