Which Statement About Movement of Food in the Gut Is

Multiple Choice

Which statement about movement of food in the gut is true?

A) There are two sphincters in the vertebrate gut, one at the anterior end and one at the posterior end.
B) Peristalsis is under voluntary control.
C) Smooth muscle of the gut contracts in response to being stretched.
D) Peristalsis begins when food enters the glottis.
E) The muscle in a sphincter is normally relaxed.