An avid student of GI physiology decides to swallow a marble…
An avid student of GI physiology decides to swallow a marble and trace its path through their gastrointestinal system (this is not recommended). Which of the following structures would be the fourth sphincter that the marble passes through on its way through the GI system?
Read DetailsA 28-year-old man presents with chronic watery diarrhea for…
A 28-year-old man presents with chronic watery diarrhea for 3 months. He reports large-volume stools that persist even during fasting. He denies weight loss or blood in stool. Laboratory evaluation reveals the following stool studies: Stool sodium: 95 mEq/L Stool potassium: 40 mEq/L Which of the following is the most likely mechanism of this patient’s diarrhea?
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