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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.
Answer:
evolved specialized tubules lined with transport epithelia
Explanation:
The epithelium is a basic tissue that forms a continuous, protective layer of cells. Moreover, transport epithelia are specialized types of epithelium that are involved in the absorption of ions and water from one side to the other of the epithelium, which are responsible for the movement of solutes both in osmoregulation and excretion. During the evolution of excretory organs, higher animals developed specialized tubules associated with transport epithelia whose function is to excrete waste products and selectively retain (filter) nutrients.
The main reason that attitudes are more often revealed in spoken rather than written language is because in writing, we can easily conceal our attitudes. The correct answer is D.
Answer:
1. We can lessen our impact on Earth by using more renewable resources instead of nonrenewable resources. If we were to use these we would stop wasting so much unneeded energy.
Explanation:
