Question

43 multiple choice 10 points a child hanging upside down from a tree takes a bite from a candy bar. they manage to chew the candy and swallow it successfully. how does the bolus move along the esophagus? the epiglottis pushes the bolus into the esophagus and forces it to remain there until the child returns to an upright position, when gravity can move it to the stomach. the pharyngeal constrictor muscles push the bolus into the esophagus and force it to remain there until the child returns to an upright position, when gravity can move it to the stomach. pressure changes due to inhalation draw the bolus through the esophagus. peristalsis of the esophageal walls force the bolus to the stomach.

Explanation:

Peristalsis is the rhythmic contraction and relaxation of the esophageal walls that propels the bolus of food towards the stomach, regardless of body - position. The epiglottis prevents food from entering the trachea during swallowing, not from moving the bolus in the esophagus. Pharyngeal constrictor muscles are involved in moving the bolus from the pharynx to the esophagus, not in retaining it in the esophagus. Inhalation pressure changes do not draw the bolus through the esophagus.

Answer:

Peristalsis of the esophageal walls force the bolus to the stomach.