Nokea
Ferritin is a globular protein that transports and stores ______ in the liver and blood.
- A. glycogen
- B. lipids
- C. vitamin B12
- D. iron
Correct Answer: D
Rationale: The correct answer is D: iron. Ferritin is a protein that binds and stores iron in the liver and blood. It plays a crucial role in regulating iron levels in the body. Glycogen (A) is a storage form of glucose, not stored by ferritin. Lipids (B) are not stored by ferritin either. Vitamin B12 (C) is mainly stored in the liver bound to specific proteins, not ferritin. Iron is the correct answer as it aligns with the main function of ferritin in iron transport and storage.
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Which of these organs is not considered an accessory digestive structure?
- A. mouth
- B. salivary glands
- C. pancreas
- D. liver
Correct Answer: A
Rationale: The correct answer is A: mouth. The mouth is not considered an accessory digestive structure because it is part of the main digestive system. The mouth is where the process of digestion begins with the mechanical breakdown of food through chewing and the chemical breakdown through the action of saliva produced by salivary glands. The salivary glands, pancreas, and liver are all accessory digestive structures because they aid in the digestion process but are not part of the alimentary canal. Salivary glands produce enzymes to further break down food, the pancreas secretes digestive enzymes and bicarbonate into the small intestine, and the liver produces bile to aid in the digestion and absorption of fats. These organs work alongside the main digestive system to help with the breakdown and absorption of nutrients.
A nurse is caring for a client who has peptic ulcer disease. The nurse should monitor the client for which of the following findings as an indication of gastrointestinal perforation?
- A. Hyperactive bowel sounds
- B. Sudden abdominal pain
- C. Increased blood pressure
- D. Bradycardia
Correct Answer: B
Rationale: The correct answer is B: Sudden abdominal pain. Gastrointestinal perforation is a serious complication of peptic ulcer disease. Sudden abdominal pain is a key indicator as perforation can lead to leakage of stomach contents into the abdominal cavity causing severe pain. Hyperactive bowel sounds (A) are more indicative of bowel obstruction. Increased blood pressure (C) can occur due to pain or stress but is not specific to gastrointestinal perforation. Bradycardia (D) is not typically associated with gastrointestinal perforation.
Secretin hormone:
- A. Released in response to acidic gastric juice.
- B. Stimulates stomach mobility.
- C. Stimulates HCL secretion.
- D. All of the above are correct.
Correct Answer: A
Rationale: The correct answer is A because secretin hormone is released in response to acidic gastric juice, acting to neutralize the acidity by stimulating pancreatic bicarbonate secretion. Choice B and C are incorrect as secretin does not stimulate stomach mobility or HCL secretion. Therefore, the correct answer is A as it aligns with the function of secretin in regulating pH balance in the digestive system.
A nurse is caring for a client who has an active upper gastrointestinal bleed. After inserting a NG tube into the client, which of the following findings should the nurse anticipate?
- A. Frothy pink drainage
- B. Dark amber drainage
- C. Coffee-ground drainage
- D. Greenish-yellow drainage
Correct Answer: C
Rationale: The correct answer is C: Coffee-ground drainage. This indicates upper GI bleed, where blood mixes with gastric acid, forming a coffee-ground appearance. Frothy pink drainage (A) is more common in respiratory issues. Dark amber drainage (B) is typical for lower GI bleeds. Greenish-yellow drainage (D) is not associated with GI bleeding. In this case, the nurse should monitor for coffee-ground drainage to assess the severity of the upper GI bleed.
The actions of secretin include:
- A. Increased salivary secretion
- B. Relaxation of the oesophageal sphincters
- C. Stimulation of gastric secretion
- D. Stimulation of secretion of bicarbonate by pancreatic duct cells
Correct Answer: D
Rationale: The correct answer is D because secretin is a hormone that stimulates the secretion of bicarbonate by pancreatic duct cells. This helps neutralize the acidic chyme entering the duodenum from the stomach. A is incorrect because secretin does not directly affect salivary secretion. B is incorrect because secretin does not relax the esophageal sphincters. C is incorrect because secretin inhibits gastric secretion rather than stimulating it. Therefore, the correct choice is D as it aligns with the physiological role of secretin in pancreatic bicarbonate secretion.