i had this question and it was price
hope this helps
True Skeletal muscles are the muscles that move your bones; these
muscles are voluntary, meaning they are under your control
True Eventually, all skeletal muscles get tired.
True Cardiac muscle is found in your heart and it is involuntary:
that is, NOT under your control.
True The best way to keep your muscles healthy is to use them.
Answer:
The correct answer is: upper esophageal sphincter.
Explanation:
The alimentary canal is a very long tract responsible for the digestion of the food. It is composed of several organs with many different and important functions. The alimentary canal also has a few sphincters, which are muscular valves that open and close when needed for the food to pass or be retained.
The first sphincter is the upper esophageal sphincter. One particularity of this sphincter is that is one of the few sphincters in the body that opens and closes under our conscious control, which happens when we decide to swallow our food.
From the first to the last, the order of the sphincters in the gastrointestinal tract is: upper esophageal sphincter, lower esophageal sphincter or gastroesophageal sphincter, pyloric sphincter, ileocecal sphincter, and anus.
