Answer to Question 1
Correct Answer: 2
Rationale 1: The pyloric sphincter is located at the gastroduodenal junction.
Rationale 2: During esophageal reflux, the stomach contracts, overwhelming the lower esophageal sphincter (cardiac sphincter).
Rationale 3: The urethral sphincter is not involved in esophageal reflux.
Rationale 4: Oddi's sphincter is at the hepatopancreatic ampulla.
Global Rationale: During esophageal reflux, the stomach contracts, overwhelming the lower esophageal sphincter (cardiac sphincter). The pyloric sphincter is located at the gastroduodenal junction. The urethral sphincter is not involved in esophageal reflux. Oddi's sphincter is at the hepatopancreatic ampulla.
Answer to Question 2
Correct Answer: 1
Rationale 1: The esophagus does not secrete digestive enzymes.
Rationale 2: The small intestine secretes digestive enzymes.
Rationale 3: The salivary glands secrete digestive enzymes.
Rationale 4: The stomach secretes digestive enzymes.
Global Rationale: Digestive enzymes are secreted by the salivary glands, stomach, small intestine, and pancreas. The esophagus is not part of this process.