Question

which muscle closes the esophagus to/from the pharynx?
a. anal sphincter
b. inferior pharyngeal constrictor
c. pyloric sphincter
d. lower esophageal sphincter

Explanation:

• Anal sphincter: Controls the opening of the anus, not related to esophagus - pharynx.
• Inferior pharyngeal constrictor: Part of the pharyngeal muscles, helps in swallowing and closing the esophagus from the pharynx.
• Pyloric sphincter: Controls the opening between the stomach and duodenum.
• Lower esophageal sphincter: Controls the opening between the esophagus and stomach.

Answer:

B. inferior pharyngeal constrictor