Nokea
In the colon, the teniae coli are bands of ______, which contract to form ______.
- A. fat; epiploic appendages
- B. longitudinal smooth muscle; haustra
- C. skeletal muscle; haustra
- D. smooth muscle; the internal anal sphincter
Correct Answer: B
Rationale: The correct answer is B because the teniae coli are bands of longitudinal smooth muscle in the colon. These bands contract to form haustra, which are the pouches that give the colon its segmented appearance. Choice A is incorrect because fat and epiploic appendages are not involved in the contraction of the colon. Choice C is incorrect because the teniae coli are smooth muscle, not skeletal muscle. Choice D is incorrect because the internal anal sphincter is not formed by the contraction of the teniae coli.
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The Mallory-Weiss syndrome refers to the occurrence of gastrointestinal hemorrhage as a result of:
- A. esophageal varices
- B. esophageal peptic ulcers
- C. mucosal tears at the esophagogastric junction
- D. iatrogenic perforation
Correct Answer: C
Rationale: The Mallory-Weiss syndrome is characterized by mucosal tears at the esophagogastric junction. This occurs due to forceful or prolonged vomiting causing the tears in the mucosa. Esophageal varices (A) are dilated veins in the esophagus typically associated with liver disease, not related to Mallory-Weiss syndrome. Esophageal peptic ulcers (B) are erosions in the lining of the esophagus caused by acid reflux or infection, not a characteristic of Mallory-Weiss syndrome. Iatrogenic perforation (D) refers to accidental perforation caused during a medical procedure, not related to Mallory-Weiss syndrome. Therefore, the correct answer is C as it directly correlates with the characteristic presentation of Mallory-Weiss syndrome.
You would be most concerned about which client having an order for TPN (total parenteral nutrition) fat emulsion?
- A. A client with gastrointestinal obstruction
- B. A client with severe anorexia nervosa
- C. A client with chronic diarrhea and vomiting
- D. A client with a fractured femur
Correct Answer: D
Rationale: Correct Answer: D
Rationale:
1. TPN fat emulsion can increase the risk of fat embolism in clients with fractures.
2. Fat embolism is a serious complication in clients with long bone fractures, like a fractured femur.
3. Clients with gastrointestinal issues, anorexia nervosa, chronic diarrhea, or vomiting are not at increased risk for fat embolism.
4. Monitoring for signs of fat embolism is crucial in clients receiving TPN fat emulsion to prevent complications.
The absorption of fructose by intestinal mucosa is
- A. co- transport mechanism
- B. simple diffusion
- C. facilitated transport
- D. active transport
Correct Answer: C
Rationale: The correct answer is C: facilitated transport. Fructose is absorbed through facilitated diffusion using specific carrier proteins in the intestinal mucosa. This process does not require energy input and allows fructose to move down its concentration gradient. Unlike active transport (requiring energy) and co-transport mechanisms (involving multiple substances), fructose absorption occurs through facilitated transport by specific carrier proteins. Simple diffusion is not the main mechanism for fructose absorption due to its hydrophilic nature. Thus, facilitated transport best describes how fructose is absorbed by the intestinal mucosa.
Which organ produces bile?
- A. Pancreas
- B. Gallbladder
- C. Liver
- D. Stomach
Correct Answer: C
Rationale: The correct answer is C: Liver. The liver produces bile, which plays a crucial role in digestion by breaking down fats. The pancreas (A) produces digestive enzymes, not bile. The gallbladder (B) stores bile produced by the liver but does not produce it. The stomach (D) produces gastric juices, not bile. Therefore, the liver is the only organ that produces bile, making it the correct answer.
A nurse is caring for a client who reports having chronic constipation. Which of the following herbal supplements should the nurse recommend?
- A. Ginseng
- B. Coenzyme Q-10
- C. Cranberry juice
- D. Flaxseed
Correct Answer: D
Rationale: The correct answer is D: Flaxseed. Flaxseed is rich in fiber, which helps promote bowel regularity and relieve constipation. The insoluble fiber in flaxseed adds bulk to stool, making it easier to pass. Ginseng (A) is not typically used for constipation. Coenzyme Q-10 (B) is not known to alleviate constipation. Cranberry juice (C) is more commonly used for urinary tract health, not constipation. Flaxseed is the best choice due to its high fiber content and effectiveness in promoting regular bowel movements.