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What contributes to increased protein-calorie needs?
- A. Surgery
- B. Vegan diet
- C. Lowered temperature
- D. Cultural or religious beliefs
Correct Answer: A
Rationale: The correct answer is A: Surgery. Surgery increases protein-calorie needs due to the body's increased demand for nutrients to support healing and recovery. The body requires more protein and calories to repair tissues and maintain immune function post-surgery.
Choice B: A vegan diet does not necessarily contribute to increased protein-calorie needs as it is possible to meet nutritional requirements with proper planning.
Choice C: Lowered temperature does not directly affect protein-calorie needs.
Choice D: Cultural or religious beliefs do not inherently increase protein-calorie needs, as dietary choices can still meet nutritional requirements.
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Hepatocytes or hepatic cells produce bile, which is secreted into the
- A. hepatic portal vein.
- B. bile canaliculi.
- C. hepatic sinusoid.
- D. lacteal.
Correct Answer: B
Rationale: The correct answer is B: bile canaliculi. Hepatocytes produce bile, which is then secreted into bile canaliculi within the liver. From there, bile flows into bile ducts and eventually reaches the gallbladder or small intestine. The other options are incorrect because bile is not secreted directly into the hepatic portal vein (A), hepatic sinusoid (C), or lacteal (D). The hepatic portal vein carries blood from the digestive organs to the liver, the hepatic sinusoid is a type of blood vessel within the liver, and lacteals are lymphatic vessels in the small intestine.
Priority Decision: The nurse admitting a patient for bariatric surgery obtains the following information from the patient. Which finding should be brought to the surgeon's attention before proceeding with further patient preparation?
- A. History of hypertension
- B. History of untreated depression
- C. History of multiple attempts at weight loss
- D. History of sleep apnea treated with continuous positive airway pressure (CPAP)
Correct Answer: B
Rationale: The correct answer is B: History of untreated depression. Before proceeding with further patient preparation for bariatric surgery, it is crucial to address untreated depression as it can significantly impact the patient's mental and emotional well-being post-operatively. Untreated depression can lead to poor compliance with post-operative instructions, medication management issues, and potentially increase the risk of complications. It is essential to involve the surgeon to assess the patient's psychological readiness for surgery and ensure appropriate support and resources are in place.
Incorrect choices:
A: History of hypertension - While hypertension should be managed pre-operatively, it is not a critical factor that would require immediate attention before further preparation.
C: History of multiple attempts at weight loss - This is a common issue in patients undergoing bariatric surgery and does not pose an immediate risk that needs urgent attention.
D: History of sleep apnea treated with CPAP - While sleep apnea is a relevant consideration for bariatric surgery, the fact that it is being treated with
Proteins are digested or broken down by the _____ in the stomach.
- A. pepsinogen
- B. pepsin
- C. hydrochloric acid
- D. lipase
Correct Answer: B
Rationale: The correct answer is B: pepsin. Pepsin is an enzyme secreted by the stomach that breaks down proteins into peptides. Initially, pepsin is produced in an inactive form called pepsinogen, which is activated by the acidic environment in the stomach. Pepsin works optimally at a low pH, which is maintained by hydrochloric acid (choice C) in the stomach. Lipase (choice D) is an enzyme that breaks down fats, not proteins. So, the correct enzyme responsible for digesting proteins in the stomach is pepsin.
During the gastric phase of digestion
- A. There is neural stimulation only
- B. There is decreased contractility
- C. The bolus composition is detected by chemoreceptors
- D. It only takes minutes
Correct Answer: C
Rationale: Rationale:
1. Gastric phase starts when food enters the stomach.
2. Chemoreceptors detect bolus composition to initiate gastric secretions.
3. This detection triggers release of gastric juices for digestion.
4. Neural stimulation also occurs during gastric phase, but not exclusively.
5. Contractility increases during gastric phase for mixing and churning.
In summary, choice C is correct as chemoreceptors detect bolus composition during the gastric phase, while the other choices are incorrect because they do not accurately reflect the physiological processes during this phase.
Which of these ingredients in saliva is responsible for activating salivary amylase?
- A. mucus
- B. phosphate ions
- C. chloride ions
- D. urea
Correct Answer: B
Rationale: The correct answer is B: phosphate ions. Phosphate ions present in saliva help activate salivary amylase by providing the necessary environment for the enzyme to function optimally. Salivary amylase works best at a slightly alkaline pH, which is facilitated by the presence of phosphate ions. Mucus (choice A) primarily helps with lubrication and binding of food particles but does not activate enzymes. Chloride ions (choice C) are not directly involved in activating salivary amylase. Urea (choice D) is a waste product and not related to enzyme activation in saliva. In summary, the correct answer is B because phosphate ions create the optimal pH environment for salivary amylase activity, while the other choices are not directly involved in enzyme activation.