Which process occurs during the pharyngeal phase of swallowing?
◯ Mouth shuts as a bolus of food is pushed back into the oropharynx by the tongue.
◯ Longitudinal muscles propel the bolus of food down the esophagus.
◯ Lower esophageal sphincter is activated by distention and opens.
◯ Epiglottis covers the space between the vocal cords and entrance to the trachea