Which symptom is specifically related to the stomach's response to gastric irritation?

Heartburn is specifically related to the stomach's response to gastric irritation due to its association with acid reflux and irritation of the esophagus. When the stomach produces excess acid or is irritated, this can lead to the backward flow of stomach contents into the esophagus, resulting in a burning sensation in the chest or throat known as heartburn. This symptom is commonly felt after eating, especially if one consumes spicy or fatty foods, and is directly linked to the gastrointestinal system's response to irritation. Understanding heartburn in this context emphasizes its relation to the stomach's activity and the consequences of gastric irritation on a person's overall experience.