What is the common mechanism of action for all antidepressants, whether they are SSRIs or tricyclics?

Choice A reason: Crohn’s disease does not always spread to the liver. While it can cause liver complications like primary sclerosing cholangitis or fatty liver in some cases, this is not universal. This statement is inaccurate, as liver involvement is a complication, not a defining feature of Crohn’s disease.

Choice B reason: Crohn’s disease is characterized by a patchy, or “skip lesion,” pattern of bowel involvement, affecting any part of the gastrointestinal tract discontinuously. Inflammation is transmural, causing fistulas or strictures. This statement is accurate, as the patchy distribution is a hallmark distinguishing it from ulcerative colitis.

Choice C reason: Continuous bowel involvement is characteristic of ulcerative colitis, not Crohn’s disease. Crohn’s affects the bowel in a segmental, patchy manner, with healthy areas between lesions. This statement is inaccurate, as it incorrectly describes Crohn’s tissue involvement pattern, which is distinctly non-continuous.

Choice D reason: Crohn’s disease increases cardiovascular risk due to chronic inflammation, but stroke is not a well-established direct complication. Inflammatory markers may contribute to atherosclerosis, but stroke risk is less specific than patchy bowel involvement. This statement is inaccurate, as it overstates a specific stroke association.

Choice A reason: Melena, dark tarry stools from digested blood, indicates upper gastrointestinal bleeding, not typically GERD. GERD involves acid reflux causing esophageal irritation, not bleeding severe enough for melena. This statement is inaccurate, as melena is more associated with ulcers or varices, not reflux disease.

Choice B reason: Heartburn, a burning sensation in the chest, is a hallmark of GERD, caused by stomach acid refluxing into the esophagus, irritating the mucosa. It results from lower esophageal sphincter dysfunction, allowing acid backflow. This statement is accurate, as heartburn is a primary diagnostic symptom of GERD.

Choice C reason: Hematemesis, vomiting blood, is not a common GERD symptom but indicates severe conditions like esophageal varices or ulcers. While chronic GERD may lead to esophagitis, bleeding is rare. This statement is inaccurate, as hematemesis is not a characteristic feature of typical GERD presentations.

Choice D reason: Dysphagia, difficulty swallowing, can occur in severe GERD due to esophageal strictures or motility issues but is not a primary characteristic. Heartburn is more common and diagnostic. This statement is less accurate, as dysphagia is a complication, not a defining feature of GERD.