LPN exams medical-surgical practice questions

Correct answer:

The correct answer is B, the discovery that cell-free serum could transfer immunity. This finding led humoralists to dominate because it supported the idea of circulating antibodies in the serum being responsible for immunity. This concept aligned with the humoralist theory, which focused on the role of antibodies in immune response. The ability of cell-free serum to transfer immunity provided direct evidence for humoralists' beliefs. Choice A (The demonstration of the Germ Theory of disease) is incorrect because while it was a significant advancement in understanding disease, it did not directly impact the argument between cellularists and humoralists regarding the immune response. Choice C (The discovery of the tuberculin reaction) is incorrect as it was more relevant to the understanding of the immune response to tuberculosis specifically, rather than the broader debate between cellularists and humoralists. Choice D (The determination of the antibody structure) is incorrect because while understanding antibody structure is crucial, it did not have as direct an impact on the dominance of

Correct answer:

Rationale for Correct Answer (C): The nurse should instruct the patient to increase fluid intake while taking interferon alfa 2b because this medication can lead to dehydration as a side effect. Increasing fluid intake can help prevent dehydration and support overall well-being during treatment. Dehydration can worsen side effects and impact treatment efficacy. Summary of Incorrect Choices: A: Avoid drinking alcohol while taking the drug - While it is generally advisable to limit alcohol consumption during medical treatment, there is no specific interaction between interferon alfa 2b and alcohol mentioned in the question. B: Continue to maintain maximal physical activity - This choice is not directly related to the medication instructions provided in the question. Excessive physical activity may not always be appropriate for patients undergoing leukemia treatment. D: Treat constipation with over-the-counter laxatives - Constipation is not a common side effect associated with interferon alfa 2b, so using laxatives may not be necessary unless specifically recommended by a healthcare provider.

Correct answer:

The correct answer is A because the client's statement indicates a lack of understanding about the comprehensive approach needed to address obesity. Phentermine/topiramate-ER is not a standalone solution; it is most effective when used in conjunction with lifestyle changes like exercise and dietary modifications. By expressing a dislike for exercise and dietary changes, the client demonstrates a reliance solely on the medication, which is not conducive to long-term weight management. This suggests a need for further education on the importance of holistic lifestyle modifications in conjunction with medication therapy. Choice B is incorrect because the client expressing disbelief at medications for obesity is not necessarily indicative of a need for further education; it may simply reflect surprise or lack of awareness. Choice C is incorrect as the client's nervousness about blood tests is a common concern and does not necessarily indicate a need for more education. Choice D is also incorrect as financial concerns are valid but do not directly relate to the need for additional health education.

Correct answer:

The skin's ability to restrict fluid loss is a vital protective function, primarily achieved through its outermost layer, the stratum corneum, which is rich in keratin. Keratin is a tough, fibrous protein that forms a waterproof barrier, preventing water from escaping the body and protecting against environmental damage. The stratum germinativum, the deepest epidermal layer, is responsible for cell production, not water retention. Carotene, a pigment, contributes to skin color but has no role in fluid regulation. Melanocytes produce melanin for UV protection, not water barrier functions. The dermis, while supportive, relies on the epidermis specifically keratin for this role. In conditions like burns, where keratin is compromised, fluid loss increases dramatically, underscoring its importance. Evolutionary adaptations, such as thicker keratin layers in terrestrial animals, further highlight its role in preventing desiccation. Thus, keratin stands out as the key structural component limiting fluid loss through the integument, distinguishing it from the other options' unrelated functions.

Correct answer:

The skin's ability to restrict fluid loss is a vital protective function, primarily achieved through its outermost layer, the stratum corneum, which is rich in keratin. Keratin is a tough, fibrous protein that forms a waterproof barrier, preventing water from escaping the body and protecting against environmental damage. The stratum germinativum, the deepest epidermal layer, is responsible for cell production, not water retention. Carotene, a pigment, contributes to skin color but has no role in fluid regulation. Melanocytes produce melanin for UV protection, not water barrier functions. The dermis, while supportive, relies on the epidermis specifically keratin for this role. In conditions like burns, where keratin is compromised, fluid loss increases dramatically, underscoring its importance. Evolutionary adaptations, such as thicker keratin layers in terrestrial animals, further highlight its role in preventing desiccation. Thus, keratin stands out as the key structural component limiting fluid loss through the integument, distinguishing it from the other options' unrelated functions.

Correct answer:

The skin's ability to restrict fluid loss is a vital protective function, primarily achieved through its outermost layer, the stratum corneum, which is rich in keratin. Keratin is a tough, fibrous protein that forms a waterproof barrier, preventing water from escaping the body and protecting against environmental damage. The stratum germinativum, the deepest epidermal layer, is responsible for cell production, not water retention. Carotene, a pigment, contributes to skin color but has no role in fluid regulation. Melanocytes produce melanin for UV protection, not water barrier functions. The dermis, while supportive, relies on the epidermis specifically keratin for this role. In conditions like burns, where keratin is compromised, fluid loss increases dramatically, underscoring its importance. Evolutionary adaptations, such as thicker keratin layers in terrestrial animals, further highlight its role in preventing desiccation. Thus, keratin stands out as the key structural component limiting fluid loss through the integument, distinguishing it from the other options' unrelated functions.

Correct answer:

The correct answer is D: Administration of antibiotics to the client during labor. This is because giving antibiotics to the mother during labor can significantly reduce the risk of transmitting Group B streptococcus to the neonate during delivery. The antibiotics help to eradicate the bacteria in the birth canal, thus decreasing the chances of the baby becoming infected during birth. Not breastfeeding the neonate during the first week after birth (choice A) is not the correct intervention as breastfeeding is still recommended even if the mother is positive for Group B streptococcus. Administration of antibiotics to the neonate after birth (choice B) is not the first-line intervention as preventing transmission during labor is more effective than treating the neonate after birth. Delivery by cesarean section (choice C) is not the preferred intervention unless there are other obstetric indications for a cesarean section. Administering antibiotics to the client during labor (choice D) is the most appropriate intervention to prevent transmission of infection to the

Correct answer:

The correct answer is B: Acute pain related to central nervous system (CNS), gastrointestinal (GI), and flu-like effects. This nursing diagnosis is appropriate for a patient receiving immune suppressants for leukemia as these medications can cause adverse effects such as CNS, GI, and flu-like symptoms leading to acute pain. The nurse should assess the patient for these symptoms and provide interventions to manage pain effectively. Incorrect Choices: A: Anxiety related to diagnosis and drug therapy - While anxiety can be common in patients with leukemia and receiving immune suppressants, acute pain is a more specific and immediate concern that should be addressed first. C: Risk for infection related to immune stimulation - This is not the most immediate concern for a patient receiving immune suppressants, as the main focus should be on managing side effects such as pain. D: Imbalanced nutrition: More than body requirements - This nursing diagnosis is not directly related to the side effects of immune suppressants and would not be the priority for this patient.

Correct answer:

The correct answer is A: A few minutes before the next scheduled dose of medication. This timing ensures that the trough level represents the lowest concentration of the antibiotic in the client's bloodstream, allowing for an accurate assessment of how well the medication is being metabolized and eliminated. Explanation: 1. Trough level is usually measured just before the next dose to ensure that the drug has reached its lowest concentration. 2. This timing helps determine if the drug concentration remains within the therapeutic range and if adjustments to the dosing regimen are needed. 3. Option B is incorrect because waiting 1-2 hours after oral administration would not reflect the trough level. 4. Option C is incorrect as measuring 30 minutes after IV administration would not capture the trough level accurately. 5. Option D is incorrect because measuring during infusion would not provide an accurate trough level. In summary, the trough level should be ordered just before the next dose to accurately assess the drug's concentration at its lowest point.

Correct answer:

The correct answer is C: New influenza variants able to escape prior immunity regularly. This is because influenza viruses have high mutation rates, leading to the emergence of new strains that can evade previously acquired immunity. This phenomenon is known as antigenic drift, making it challenging for the immune system to recognize and respond effectively to the constantly evolving strains. A: Effective immunological memory fails to develop - This is incorrect as the immune system does develop memory cells upon exposure to influenza, but the issue lies in the ability of these memory cells to recognize and combat the rapidly changing strains. B: Immune responses to influenza involve innate immune mechanisms only - This is incorrect as both innate and adaptive immune responses are involved in fighting influenza, with adaptive immunity playing a crucial role in generating specific memory cells. D: Influenza virus targets memory cells - This is incorrect as influenza primarily targets respiratory epithelial cells rather than specifically targeting memory cells.