Question

A Review Part A Place the events that occur after partially digested food leaves the stomach in the right order. Rank from the earliest event to the latest. Reset Help Bicarbonate secretion Signal detection 1 Increase in acidity Decrease in acidity Circulation Signal detection 2 Secretin secretion First event Last event ubmit Previous Answers Request Answer

Answer 1

The partially digested food in stomach is called chyme which is gradually released into small intestine. High acidity stimulates duodenal wall to release the hormone secretin. This hormone then circulates in blood and acts on pancreas. Pancreas detects this signal and releases bicarbonate into stomach. This neutralizes acidity and acidity decreases.

Hence, steps in sequence should be:

First event: Increase in acidity. Signal detection 1. Secretin secretion. Circulation. Signal detection 2. Bicarbonate secretion. Acidity decreases. Last event