ATI RN
Gastrointestinal Tract Questions and Answers PDF Questions
Question 1 of 5
Melena is an indication of:
Correct Answer: A
Rationale: The correct answer is A: upper gastrointestinal bleeding. Melena is black, tarry stool resulting from the digestion of blood in the gastrointestinal tract. This typically occurs in the upper GI tract due to the longer transit time, allowing the blood to be digested. Lower GI bleeding usually presents as bright red blood in the stool or maroon-colored stool. Therefore, melena is a specific indicator of upper GI bleeding. Choices B, C, and D are incorrect because melena specifically points to upper GI bleeding, not lower GI bleeding or both.
Question 2 of 5
Which of the following is not a function of saliva:
Correct Answer: C
Rationale: The correct answer is C because saliva does not help in dental caries by increasing acidity; in fact, saliva helps neutralize acids and remineralize teeth. A: Saliva does help in articulation by lubricating the mouth. B: Saliva helps in swallowing by moistening food. D: Saliva contains lysozymes that kill microorganisms, aiding in oral hygiene.
Question 3 of 5
For an organ lying within a body cavity, the tissue which is farthest away from the inner core or lumen of the organ is called the:
Correct Answer: B
Rationale: The correct answer is B: Serosa. The serosa is the outermost layer of an organ lying within a body cavity. It is composed of connective tissue covered by a layer of mesothelium. This layer is farthest away from the inner core or lumen of the organ. The muscularis externa (choice A) is the layer of muscle tissue located just beneath the serosa. The mucosa (choice C) is the innermost layer of the organ, lining the lumen. The myenteric plexus (choice D) is a network of nerve fibers located between the circular and longitudinal layers of the muscularis externa, playing a role in regulating gastrointestinal motility.
Question 4 of 5
What is the final product of carbohydrate digestion in the small intestine?
Correct Answer: D
Rationale: The final product of carbohydrate digestion in the small intestine is glucose. Carbohydrates are broken down into simple sugars like glucose during digestion. Enzymes in the small intestine, such as amylase, break down complex carbohydrates into glucose molecules, which can then be absorbed into the bloodstream for energy. Fatty acids (A) are the final product of lipid digestion, while amino acids (B) are the final product of protein digestion. Choice C is irrelevant. In summary, glucose is the correct answer as it is the end product of carbohydrate digestion, while the other choices are related to different types of digestion products.
Question 5 of 5
A 20-yr-old woman is being admitted with electrolyte disorders of unknown etiology. Which assessment finding is most important to report to the health care provider?
Correct Answer: D
Rationale: The correct answer is D. A serum potassium level of 2.9 mEq/L indicates hypokalemia, which can be life-threatening. Hypokalemia can lead to cardiac arrhythmias and muscle weakness. It is crucial to report this finding promptly to the healthcare provider for immediate intervention. Choice A is relevant but not as urgent as hypokalemia. Choice B is unrelated to electrolyte disorders. Choice C is incomplete and does not provide any relevant information.