Which of the Following Statements Are True of the Pharynx

Multiple Choice

Which of the following statements are true of the pharynx and esophagus? (Read carefully and select all of the correct statements.)

A) Peristalsis of the esophagus is part of the swallowing reflex.
B) The oropharynx and laryngopharynx are passageways for both food and air (at different times) .
C) The lower esophageal sphincter (LES) is usually contracted, except when something is swallowed.
D) No digestion takes place in the pharynx or esophagus.