Lecture 4- The Stomach - Purgers- anorexia o Normal State...

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Lecture 4: The Stomach 18/12/2009 15:10:00 Swallowing Food Travel  o Food enters the mouth o Goes through the esophagus Movement caused by peristalsis o Bypasses the trachea Epiglottis closes over trachea opening Heimlich Maneuver  o Remember person cannot ask for help  o Perform Heimlich  o Gently slap back for assistance Swallowing o Initiated by touch receptors at the back of the mouth o Peristalsis causes the food (bolus) to move through system  Behind bolus is muscle contraction Ahead of bolus is muscle relaxation Goes through body until excreted as waste Entering the Stomach o Vagus Nerve is stimulated o Esophageal Sphincter  “Tone” is modulated by parasympathetic  Can be voluntarily controlled.  Belchers  Beer Pourers Sword Swallowers
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Unformatted text preview: Purgers- anorexia o Normal State of the Stomach Esophagus Sphincter is closed Stomach is small- constricted o Food enters, expands stomach Pyloric Sphincter is closed Esophagus Sphincter closes and opens TNF- Tumor Necrosis Factor Activated when stomach content disagrees with body Caused by bacteria, viruses, etc Causes brain to stimulate Vagus nerve -> opens E. Sphincter and vomit Stomach returns to normal state of constriction o Gag Reflex Back of the mouth (uvula) near tonsils Causes induced vomiting o Purging Severe Consequences Esophageal lesions Tooth decay Cardiac irregularities Death 18/12/2009 15:10:00 18/12/2009 15:10:00...
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This note was uploaded on 11/29/2010 for the course NS 1150 at Cornell University (Engineering School).

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Lecture 4- The Stomach - Purgers- anorexia o Normal State...

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