Nokea
The liver contains special blood channels termed _____.
- A. sinusoids
- B. central vein
- C. hepatic cells
- D. portal veins
Correct Answer: A
Rationale: The correct answer is A: sinusoids. Sinusoids are specialized blood channels found in the liver that allow for the exchange of nutrients, waste products, and toxins between hepatocytes and blood. They play a crucial role in the liver's functions of detoxification, metabolism, and storage. Central vein (B) is a vessel located in the center of liver lobules, not a blood channel. Hepatic cells (C) refer to the liver cells themselves, not blood channels. Portal veins (D) are vessels that bring blood from the digestive organs to the liver, but they are not the special blood channels within the liver.
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Which part of a tooth most closely resembles bone tissue?
- A. enamel
- B. cementum
- C. dentin
- D. gingiva
Correct Answer: C
Rationale: The correct answer is C: dentin. Dentin is the part of the tooth that closely resembles bone tissue because it is a hard, dense tissue similar to bone in composition and structure, providing support and protection to the tooth. Dentin is located beneath the enamel and cementum, forming the bulk of the tooth structure. Enamel (choice A) is the hardest tissue in the body but is not similar to bone tissue in composition. Cementum (choice B) is a hard tissue covering the roots of teeth but is not as similar to bone tissue as dentin. Gingiva (choice D) is the soft tissue that surrounds the teeth and is not similar to bone tissue.
Which of these structures is responsible for the production of bile?
- A. pancreas
- B. liver
- C. gallbladder
- D. small intestine
Correct Answer: B
Rationale: The correct answer is B: liver. The liver is responsible for the production of bile, which is a greenish-yellow fluid that aids in digestion by emulsifying fats. Bile is stored and concentrated in the gallbladder (not produced by it). The pancreas produces digestive enzymes, not bile. The small intestine is where bile is released to help with the digestion of fats, but it is not responsible for its production. Therefore, the liver is the correct answer as it is the primary organ involved in bile production.
Which assessment action will help the nurse determine if an obese patient has metabolic syndrome?
- A. Take the patient's apical pulse.
- B. Check the patient's blood pressure.
- C. Ask the patient about dietary intake.
- D. Dipstick the patient's urine for protein.
Correct Answer: B
Rationale: The correct answer is B: Check the patient's blood pressure. Monitoring blood pressure is crucial in determining if an obese patient has metabolic syndrome, as high blood pressure is one of the key criteria for diagnosing metabolic syndrome. Elevated blood pressure is a common feature of metabolic syndrome and is linked to other risk factors such as obesity, insulin resistance, and dyslipidemia. By checking the patient's blood pressure, the nurse can assess if the patient meets the criteria for metabolic syndrome.
Choice A (Take the patient's apical pulse) is not directly related to diagnosing metabolic syndrome. Choice C (Ask the patient about dietary intake) may provide important information but does not specifically help in diagnosing metabolic syndrome. Choice D (Dipstick the patient's urine for protein) is not a relevant assessment for determining metabolic syndrome.
Bile production by the liver cells is increased by:
- A. Sympathetic activation
- B. Secretin
- C. CCK
- D. Bile salts
Correct Answer: C
Rationale: The correct answer is C: CCK. Cholecystokinin (CCK) is a hormone released by the small intestine in response to the presence of fatty acids and amino acids. It stimulates the release of bile from the gallbladder and increases bile production by the liver cells to aid in digestion. Sympathetic activation (choice A) typically inhibits digestive functions. Secretin (choice B) primarily stimulates pancreatic bicarbonate secretion, not bile production. Bile salts (choice D) are products of bile, not direct stimulators of bile production. Therefore, CCK is the correct choice as it directly influences the production of bile by the liver cells.
A patient is receiving continuous enteral nutrition through a small-bore silicone feeding tube. What should the nurse plan for when this patient has a computed tomography (CT) scan ordered?
- A. Ask the health care provider to reschedule the scan.
- B. Shut the feeding off 30 to 60 minutes before the scan.
- C. Connect the feeding tube to continuous suction before and during the scan.
- D. Send a suction catheter with the patient in case of aspiration during the scan.
Correct Answer: B
Rationale: Rationale:
- Correct Answer (B): Shutting off the feeding 30-60 mins before the CT scan reduces the risk of aspiration or vomiting during the procedure, minimizing potential complications.
- Incorrect Answer (A): Rescheduling the scan is not necessary if feeding is temporarily stopped before the procedure.
- Incorrect Answer (C): Connecting the feeding tube to continuous suction is unnecessary and may lead to dehydration or electrolyte imbalances.
- Incorrect Answer (D): Sending a suction catheter with the patient is not a standard practice for CT scans; aspiration risk can be minimized by stopping the feeding temporarily.