Which is Not an Involuntary Part of the Swallowing Reflex

Question

Which is not an involuntary part of the swallowing reflex?
A)Muscles pull the pharynx upward toward the food.
B)The epiglottis closes off the top of the trachea.
C)The tongue presses against the uvula and soft palate.
D)The tongue rolls chewed food into a bolus and pushes it to the oropharynx.

Accepted Answer

The tongue rolling chewed food into a bolus and pushing it to the oropharynx is a voluntary action, initiated consciously, unlike the other options which are part of the involuntary swallowing reflex.