Among the listed enzymes, which one is most commonly present in the esophagus of patients diagnosed with gastroesophageal reflux disease (GERD)?
Pepsin
Trypsin
Chymotrypsin
Carboxypeptidase
In patients with gastroesophageal reflux disease (GERD), the enzyme most likely to be found in the esophagus is pepsin. GERD is a condition where stomach acid flows back into the esophagus, causing irritation and inflammation. Pepsin is an enzyme produced in the stomach that plays a key role in the digestion of proteins. When stomach acid refluxes into the esophagus, pepsin can also reflux along with it. The presence of pepsin in the esophagus can contribute to the breakdown of proteins in the esophageal tissues, leading to further damage and symptoms associated with GERD. Therefore, pepsin is the enzyme that is commonly found in the esophagus of patients with GERD. Hence, the correct answer is option 1.