MEDICAL
RECTUM AND ANUS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following is true regarding the pyloric sphincter:
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it allows food to enter the stomach but closes to prevent regurgitation into the esophagus
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it allows small amounts of chyme into the duodenum
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it extends to a cavity that acts as a holding chamber called the pyloric antrum
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none of the above
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Explanation:
Detailed explanation-1: -The volume of food in the stomach also affects the pyloric sphincter. When a large volume is present, it stretches the stomach walls, which in turn produces strong peristaltic waves and inhibits the pyloric sphincter from closing abruptly, allowing larger volumes of chyme to enter the duodenum.
Detailed explanation-2: -This mixture of food and digestive juices is called chyme. The force of these contractions increases in the lower parts of the stomach. With each wave, the pyloric sphincter opens and allows a little bit of chyme to pass into the duodenum.
Detailed explanation-3: -The pyloric sphincter at the bottom of the stomach governs the passage of food out of the stomach into the small intestine.
There is 1 question to complete.