Swallowing is a reflex which

A. False The reflex centres lie in the medulla oblongata.

B. True This plus closure of the glottis prevents food being aspirated into the airways.

C. True The voluntary act is propulsion of a bolus of food onto the posterior pharyngeal wall.

D. True These are essential for the peristaltic phase.

E. True Gravity can assist the reflex; tablets are more difficult to swallow when lying down.