Nursing Elites

1. What is a major constituent of cell membranes?

• A. cholesterol
• B. phospholipid
• C. saturated
• D. triglyceride

Correct answer: B

Rationale: Phospholipids are a major component of cell membranes, providing structural integrity and facilitating cell signaling. Cholesterol (choice A) is also present in cell membranes but in smaller amounts and plays a different role. Saturated (choice C) and triglyceride (choice D) are not major constituents of cell membranes.

2. What information should a working mother who wants to continue breastfeeding her infant by occasionally pumping milk ahead of time be given to help her successfully maintain breastfeeding?

• A. Breast milk can be refrigerated for up to 4 days
• B. Breast milk stored in a deep freezer can be kept for up to 12 months
• C. Heating breast milk in the microwave can degrade its nutritional quality
• D. Breast milk can be expressed either by hand or with an electric pump

Correct answer: D

Rationale: The correct answer is D. This information is crucial as it informs the mother of her options for expressing milk, which is the first step in being able to store and later feed it to her child while she's away at work. Choice A has been corrected to state that breast milk can be refrigerated for up to 4 days, providing a more accurate storage timeframe. Choice B has been revised to indicate that breast milk stored in a deep freezer can be kept for up to 12 months, aligning with the recommended storage duration. Choice C now highlights that heating breast milk in the microwave can degrade its nutritional quality, emphasizing the importance of using proper methods for warming breast milk and avoiding potential harm to the baby's health and well-being.

3. The purpose of chest percussion and vibration is to loosen secretions in the lungs. The difference between the procedures is:

• A. Percussion uses only one hand, while vibration uses both hands
• B. Percussion delivers cushioned blows to the chest with cupped palms, while vibration gently shakes secretions loose
• C. In both percussion and vibration, the hands are not on top of each other, and hand action is not in tune with the client's breath
• D. Percussion slaps the chest to loosen secretions, while vibration shakes the secretions along with the inhalation

Correct answer: D

Rationale: Chest percussion involves the use of rhythmic tapping to dislodge mucus from the lungs, facilitating its movement toward the larger airways where it can be expelled. This technique is particularly important in conditions where mucus retention is a significant risk factor for infection. The key difference between chest percussion and vibration is that percussion involves slapping the chest to loosen secretions, while vibration involves shaking the secretions along with the inhalation, aiding in moving the loosened secretions upwards for easier removal. Choices A, B, and C do not accurately describe the main difference between chest percussion and vibration, making them incorrect.

4. Which enzyme digests fiber in the large intestine?

• A. salivary amylase
• B. pancreatic amylase
• C. cellulase
• D. none of the above

Correct answer: D

Rationale: The correct answer is 'none of the above.' Human digestive enzymes like salivary amylase and pancreatic amylase cannot digest fiber. Instead, fiber is fermented by gut bacteria in the large intestine. Cellulase, which is an enzyme produced by some animals and microorganisms, can break down cellulose found in plants, but it is not a human digestive enzyme, making it an incorrect choice in this context.

5. What is the digestive action of bile?

• A. It breaks down carbohydrates
• B. It breaks down proteins
• C. It breaks down lipids
• D. It aids in fat digestion

Correct answer: D

Rationale: Bile, which is produced by the liver and stored in the gallbladder, aids in the digestion of fats. It does this by emulsifying the fats, which makes them easier for the digestive enzymes, such as lipase, to break down. While choices A, B, and C could be seen as partially correct since fats are a type of lipid and the process of breaking down fats could be seen as breaking down lipids, the most accurate answer is D, as the primary function of bile is to aid in fat digestion, not the digestion of all types of lipids or the digestion of proteins or carbohydrates.

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