Nokea
Which organ produces and secretes bile?
- A. liver
- B. gallbladder
- C. pancreas
- D. duodenum
Correct Answer: A
Rationale: The correct answer is A: liver. The liver produces and secretes bile which helps in the digestion of fats. B: gallbladder stores and concentrates bile produced by the liver. C: pancreas secretes digestive enzymes but not bile. D: duodenum is the first part of the small intestine where bile is released to aid in digestion.
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Regarding deglutition (swallowing):
- A. Pharyngeal phase is voluntary.
- B. Is controlled by a center in the medulla oblongata.
- C. Readily occurs with an open mouth.
- D. Buccal phase is accompanied by apnea.
Correct Answer: B
Rationale: The correct answer is B because swallowing is controlled by the swallowing center in the medulla oblongata. This center coordinates the complex sequence of muscle contractions involved in swallowing, ensuring food moves from the mouth to the esophagus without entering the airway. The pharyngeal phase is actually involuntary, not voluntary (Choice A). Swallowing usually occurs with a closed mouth, not an open one (Choice C). Additionally, the buccal phase is not accompanied by apnea; breathing typically continues during this phase (Choice D). Therefore, the correct answer is B due to the central control of swallowing in the medulla oblongata.
Which method is preferred for immediate treatment of an acute episode of constipation?
- A. An enema
- B. Stool softeners
- C. Increased fluid
- D. Bulk-forming medication
Correct Answer: A
Rationale: An enema is often the preferred immediate treatment for acute constipation to relieve discomfort and promote bowel evacuation.
Bacteria and other foreign material absorbed by the small intestine are destroyed by ______ cells found lining the hepatic sinusoids.
- A. Kupffer
- B. hepatic
- C. endothelial
- D. acinar
Correct Answer: A
Rationale: The correct answer is A: Kupffer cells. Kupffer cells are specialized macrophages found in the liver that play a crucial role in immune defense. They are responsible for destroying bacteria and foreign material absorbed by the small intestine as they pass through the hepatic sinusoids. Kupffer cells phagocytize these pathogens, preventing their entry into the bloodstream. The other choices, B: hepatic, C: endothelial, and D: acinar, do not have the specific function of destroying bacteria in the hepatic sinusoids. Hepatic cells are liver cells, endothelial cells line blood vessels, and acinar cells are found in exocrine glands.
What is the function of bile in digestion?
- A. Emulsify fats
- B. Break down proteins
- C. Break down carbohydrates
- D. None of the above
Correct Answer: A
Rationale: The correct answer is A: Emulsify fats. Bile emulsifies fats by breaking them down into smaller droplets, increasing the surface area for enzymes to work on, aiding in the digestion and absorption of fats. Choices B and C are incorrect as bile specifically targets fats, not proteins or carbohydrates. Choice D is incorrect as bile plays a crucial role in fat digestion.
The nurse is obtaining a history of a patient with hepatitis Which question is most appropriate for the nurse to ask?
- A. "If using drugs, do you share needles?"
- B. "Do you always practice safe sex?"
- C. "You traveled to Canada in the last month?"
- D. "Do you eat shellfish often?"
Correct Answer: D
Rationale: The correct answer is D because hepatitis can be transmitted through contaminated food or water, including shellfish. Asking about shellfish consumption helps assess the risk of exposure to hepatitis. Choice A is more relevant for HIV transmission. Choice B focuses on STDs. Choice C is not directly related to hepatitis transmission.