Biology question?

Movement of food from the stomach back into the esophagus is usually prevented by

A. the pyloric sphincter

B. reverse peristalsis

C. the cardiac sphincter

D. the pharynx

E. none of these

3 Answers

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  • ?
    Lv 6
    2 years ago
    Favourite answer

    In mid-nineteenth century and before the advent of modern endoscopes, Dr. Norman Barrett, a British thoracic surgeon, postulated the presence of a fold that functions as a flap valve between the esophagus and the stomach (gastroesophageal junction or GEJ) to prevent acid reflux. Eventually in 1996 Dr. Lucius Hill described and classified this gastroesophageal “flap valve.” Dr. Hill’s works resulted in inclusion of the flap valve in the Gray’s Anatomy reference book in 1999.

    None of these

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  • 2 years ago

    C.

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  • 2 years ago

    That is called something you can look up.

    Source(s): C
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