The correct answer is: Heartburn often results when the gastroesophageal sphincter fails to close properly.
The gastroesophageal sphincter is a muscle located at the bottom of the esophagus that has to be relaxed in order to allow food to flow down into the stomach. After it contracts (tightens), the food and the stomach acid can’t flow back up into the esophagus.
When the gastroesophageal sphincter fails to close properly acid reflux occurs and causes the heartburn.
The mitochondria breaks down food into molecules the cell can use.
I think the answer is 10 calories
A biome is a large community of plants and animals that is in a area with a distinct reagion. There are 5 types of biomes worldwide. These are aquatic, desert,forest, grassland, and tundra. Hope this helps
