During the oropharyngeal phase of swallowing, how is food prevented from entering the other openings that communicate with the pharynx
A)by elevation of the uvula, which lodges against the back of the throat
B)by closure of the nasopharyngeal sphincter
C)by the epiglottis blocking the opening between the vocal cords
D)by elevation of the larynx and closure of the vocal folds across the laryngeal opening

Question

Quizplus · Accepted Answer

During the oropharyngeal phase of swallowing, food is prevented from entering the other openings that communicate with the pharynx by elevation of the larynx and closure of the vocal folds across the laryngeal opening. This action creates a seal preventing food from entering the trachea and lungs. The other options (A, B, and C) are incorrect because the uvula, nasopharyngeal sphincter, and epiglottis play a role in preventing food from entering the nasal cavity and airways, not other openings that communicate with the pharynx.

During the Oropharyngeal Phase of Swallowing, How Is Food Prevented