Mucosal necrosis is an essential part of:

Correct Answer: B

Rationale: The correct answer is B: pseudomembranous enterocolitis. Mucosal necrosis is a key characteristic of pseudomembranous enterocolitis, a condition caused by Clostridium difficile infection. The bacteria release toxins that lead to inflammation and damage to the mucosal lining of the intestines, resulting in mucosal necrosis. Blind loop syndrome (choice A) does not specifically involve mucosal necrosis, while pseudomembranous enterocolitis (choice B) does. Choice C is incorrect because only pseudomembranous enterocolitis involves mucosal necrosis. Choice D is incorrect as pseudomembranous enterocolitis does involve mucosal necrosis.

Correct Answer: C

Rationale: The correct answer is C because dysphagia, which is difficulty swallowing, can be caused by various factors such as neurological disorders affecting the swallowing reflex or physical obstructions in the esophagus. This is a key point in understanding the causes of swallowing difficulties. Choice A is incorrect because the pharyngeal phase of swallowing is actually involuntary, not voluntary. Choice B is incorrect as the lower esophageal sphincter (LES) is normally closed to prevent acid reflux and only opens during swallowing. Choice D is incorrect because in the esophageal stage of swallowing, both liquid and solid boluses travel through the esophagus by peristalsis, not just liquid boluses.

Correct Answer: A

Rationale: The correct answer is A because parietal cells secrete hydrogen ions and chloride ions into the lumen, which combine to form hydrochloric acid, maintaining the acidic pH of the stomach essential for digestion. Option B is incorrect as alkaline mucous is produced by goblet cells, not parietal cells. Option C is incorrect as histamine is secreted by enterochromaffin-like cells, not parietal cells. Option D is incorrect as gastric lipase is primarily secreted by chief cells in the stomach.

Correct Answer: D

Rationale: The correct answer is D, stomach. The stomach is not considered an accessory digestive organ as it is part of the gastrointestinal tract. The accessory digestive organs aid in the digestion process but are not part of the tract itself. The tongue, liver, and pancreas are all considered accessory digestive organs as they play crucial roles in digestion, such as producing enzymes and bile. The stomach's main function is to store and break down food through mechanical and chemical digestion, making it a primary organ in the digestive system rather than an accessory one.

Correct Answer: D

Rationale: The correct answer is D: Breath sounds. In an unconscious stroke patient, airway patency and adequate oxygenation are critical. Assessing breath sounds more frequently than routine helps monitor for respiratory distress, such as aspiration or pneumonia. Apical pulse (B) may be important but not as immediately life-threatening as respiratory status. Bowel sounds (C) may indicate bowel function but are not as urgent as assessing breathing. By prioritizing breath sounds, the nurse can ensure timely intervention in case of respiratory compromise.