Question

read the article and use the information to answer the following questions. what is acid reflux? what is acid reflux disease? what causes it? what structures of the digestive system are involved?

Explanation:

Acid - reflux disease occurs when stomach acid flows back into the esophagus. It is often caused by a weakened lower esophageal sphincter (LES), which is a ring - like muscle at the bottom of the esophagus that normally prevents back - flow. The main structures of the digestive system involved are the esophagus and the stomach. The esophagus is the tube that carries food from the mouth to the stomach, and the stomach produces acid for digestion. When the LES doesn't close properly, stomach acid can reflux into the esophagus, causing symptoms like heartburn.

Answer:

Acid reflux disease is when stomach acid flows back into the esophagus. It is caused by a weakened lower esophageal sphincter. The esophagus and stomach are the main digestive - system structures involved.