Question

Opening of the stomach into duodenum is regulated by

• A. pyloric sphincter
• B. gastro-oesophageal sphincter
• C. epiglottis
• D. fundus

Answer 1

The correct option is A pyloric sphincter

Opening of the stomach into the duodenum is guarded by the pyloric sphincter. Sphincters are specialized muscles that relaxes or tightens to open or close a passage or opening in the body.​

Gastro-oesophageal sphincter regulates the opening of oesophagus into the stomach.

Epiglottis is a cartilaginous flap that prevents entry of food into the glottis (opening of the wind pipe) during swallowing.

Fundus is a portion of the stomach which is filled with air and gas.