RN exams medical-surgical practice questions set 3

Correct answer:

The correct answer is B because Ehrlich proposed that each cell producing antibodies would express several receptors, each specific for different antigens, whereas Burnet proposed that each single antibody-producing cell expresses only one type of receptor. This is the main difference between the two theories. Ehrlich's concept of multiple receptors per cell allows for a broader range of specificity and diversity in the immune response. The other choices are incorrect because they do not directly address the main difference between the two theories as outlined above. Choice A is incorrect because both Ehrlich and Burnet emphasized the importance of specificity, but they differed in their views on receptor diversity per cell. Choice C is incorrect because it focuses on the identity of soluble antibodies and receptors, which is not the main differentiator between the two theories. Choice D is incorrect as it mentions the release of soluble antigen receptors, which is not the main point of differentiation between Ehrlich and Burnet's theories.

Correct answer:

The correct action in this scenario is to choose option C: put a line across the sentence, make the correction over it, and sign. This method is recommended because it maintains the integrity of the original record by showing what was initially written and clearly indicating the correction. By crossing out the error, making the correction, and signing the entry, the nurse acknowledges and takes responsibility for the mistake while ensuring the accuracy and transparency of the documentation. Option A is incorrect as crossing the error many times can make the note illegible and may not clearly indicate the correction. Option B is incorrect because using correction fluid can make the note messy and may raise suspicions of tampering with the record. Option D is incorrect as erasing with a rubber eraser can damage the document and also raise concerns about the validity of the information. In summary, option C is the best choice as it allows for a clear and professional correction without compromising the integrity of the progress notes.

Correct answer:

During embryonic development, the integumentary system's layers arise from distinct germ layers. The epidermis, the outer skin layer, forms from the ectoderm, the outermost embryonic layer responsible for external structures like skin, hair, and nails. Ectodermal cells differentiate into stratified squamous epithelium, eventually keratinizing for protection. The dermis, beneath the epidermis, develops from the mesoderm, the middle germ layer that generates connective tissues, muscles, and blood vessels. Mesodermal cells form the dermis's collagen, elastic fibers, and vascular network, supporting the epidermis. The endoderm, forming internal linings like the gut, contributes neither to the epidermis nor dermis. Reversing the layers (mesoderm for epidermis, ectoderm for dermis) contradicts embryology, as does involving endoderm. This ectoderm-mesoderm pairing reflects their specialized roles ectoderm for barrier formation, mesoderm for structural support consistent with developmental biology and the integument's dual-layer functionality.

Correct answer:

The correct answer is A: Effects of oral contraceptives may be altered by liver changes or changes in immune response. Rationale: 1. Immune modulating drugs can affect liver function, potentially altering the metabolism of oral contraceptives. 2. Liver changes can impact the effectiveness of oral contraceptives by either increasing or decreasing their levels in the body. 3. Changes in immune response can also interfere with the hormonal balance maintained by oral contraceptives, leading to decreased efficacy. 4. Barrier contraceptives are recommended to prevent unintended pregnancies due to the potential interactions between immune modulating drugs and oral contraceptives. Summary of other choices: B: Incorrect. Oral contraceptives do not increase the action of immune modulating drugs; they may interact with them due to changes in metabolism. C: Incorrect. Immune modulators can affect oral contraceptives through liver metabolism rather than hormonal impact. D: Incorrect. High-estrogen pills are not the only option if barrier contrace

Correct answer:

In this scenario, the palliative nurse should prioritize encouraging the patient to conserve energy and avoid unnecessary activities (Option B). End-stage heart failure can lead to severe fatigue and limited mobility, making it essential for the patient to conserve energy to prevent exacerbating symptoms and improve quality of life. Engaging in physical therapy (Option A) may not be suitable for a patient experiencing severe fatigue, as it can further drain energy reserves. Prescribing stimulant medications (Option C) may have limited effectiveness and potential side effects. Referring the patient to a nutritionist for dietary modifications (Option D) is important for overall health but may not directly address the immediate comfort and quality of life concerns related to fatigue and limited mobility. Helping the patient prioritize energy conservation will allow them to use their limited energy for essential activities, leading to a more comfortable and fulfilling experience while receiving palliative care for end-stage heart failure.

Correct answer:

For a displaced femoral neck fracture, the most appropriate surgical procedure is usually an open reduction and internal fixation (ORIF). This procedure involves making an incision to reposition the fractured bone fragments and securing them in place with screws or other fixation devices. ORIF allows for better alignment of the fracture, which is crucial for proper healing and minimizing the risk of complications like avascular necrosis or nonunion. Closed reduction and internal fixation (CRIF) may not be as effective for displaced femoral neck fractures due to the complex nature of the fracture and the need for precise realignment and stability provided by an open surgical approach. External fixation is less commonly used for femoral neck fractures and is typically reserved for certain specific cases where internal fixation is not feasible. Closed reduction alone is unlikely to provide adequate stability for a displaced femoral neck fracture and is generally not recommended as the primary surgical treatment for this type of injury.

Correct answer:

The correct answer is D because in this scenario, the patient presents with signs suspicious of aortic injury, indicated by the widened mediastinum on chest x-ray. However, the definitive test for aortic injury is a CT scan of the chest, which is more sensitive and specific than contrast angiography. If the CT scan is normal, it effectively rules out aortic injury, making further imaging with contrast angiography unnecessary. Performing angiography in this case would expose the patient to unnecessary risks without providing additional diagnostic value. Therefore, the correct approach is to first perform a CT scan of the chest, and if it is normal, no further imaging is required. Choice A is incorrect as contrast angiography is indicated in suspected aortic injury cases. Choice B is incorrect as performing contrast angiography after a CT scan would be redundant and expose the patient to unnecessary risks. Choice C is incorrect as the accuracy of contrast angiography in diagnosing aortic rupture is not as high as indicated in the

Correct answer:

The correct answer is D because in this scenario, the patient presents with signs suspicious of aortic injury, indicated by the widened mediastinum on chest x-ray. However, the definitive test for aortic injury is a CT scan of the chest, which is more sensitive and specific than contrast angiography. If the CT scan is normal, it effectively rules out aortic injury, making further imaging with contrast angiography unnecessary. Performing angiography in this case would expose the patient to unnecessary risks without providing additional diagnostic value. Therefore, the correct approach is to first perform a CT scan of the chest, and if it is normal, no further imaging is required. Choice A is incorrect as contrast angiography is indicated in suspected aortic injury cases. Choice B is incorrect as performing contrast angiography after a CT scan would be redundant and expose the patient to unnecessary risks. Choice C is incorrect as the accuracy of contrast angiography in diagnosing aortic rupture is not as high as indicated in the

Correct answer:

A burn involving the epidermis and part of the dermis is classified as a partial-thickness burn, making choice B the correct answer. This type of burn typically presents with blisters, significant pain due to exposed nerve endings, and redness as blood vessels in the dermis are affected. It may heal spontaneously within two to three weeks with proper care or require skin grafting if deeper layers are involved. Superficial burns only affect the epidermis, causing mild pain and erythema without blisters, and heal quickly within days without scarring. Full-thickness burns extend through the epidermis, dermis, and into underlying tissues like fat or muscle, resulting in a charred appearance, no pain due to nerve destruction, and the need for surgical intervention. Deep partial-thickness burns involve most of the dermis, presenting with white or red skin and severe pain, often requiring grafting due to slower healing. The distinction lies in the depth of tissue involvement, and partial-thickness best matches the description provided.

Correct answer:

The most appropriate response from the nurse when a patient expresses frustration with the treatment plan proposed by the healthcare team is to empathize with the patient's frustration and explore their concerns further. It is important to actively listen to the patient, acknowledge their feelings, and address any questions or uncertainties they may have about the treatment plan. By engaging in open communication and demonstrating empathy, the nurse can foster a therapeutic relationship with the patient and work towards finding a solution that is mutually agreeable and beneficial for the patient's well-being. Dismissing the patient's concerns (Option A) or ignoring their frustration (Option C) can lead to a breakdown in communication and trust, which may ultimately impact the patient's compliance with the treatment plan. Similarly, telling the patient that they have no choice but to follow the treatment plan (Option D) can be perceived as dismissive and confrontational, which is not conducive to promoting patient-centered care.