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MSN 570 Advanced Pathophysiology Final 2024
1. In which disorder does a Staphylococcus aureus organism produce a toxin leading to exfoliation and large blister formation?
- A. Herpes simplex I virus
- B. Herpes simplex II virus
- C. Necrotizing fasciitis
- D. Cellulitis
Correct answer: B
Rationale: The correct answer is 'Herpes simplex I virus.' This disorder is known as Staphylococcal scalded skin syndrome (SSSS), where a Staphylococcus aureus organism produces an exfoliative toxin leading to skin exfoliation and large blister formation. Choices B, C, and D are incorrect. Herpes simplex viruses (I and II) cause different types of skin lesions and do not lead to exfoliation and blister formation. Necrotizing fasciitis is a severe soft tissue infection, while cellulitis is a bacterial skin infection that does not typically involve exfoliation and blister formation like in SSSS.
2. The nurse is planning care for a client with damage to the vestibular area of the vestibulocochlear nerve. What should the nurse include in the plan of care? Select all that apply.
- A. Assistance with ambulation
- B. Regular hearing tests
- C. Monitoring for nausea
- D. Vision assessments
Correct answer: A
Rationale: Damage to the vestibular area affects balance and may cause nausea. Therefore, the nurse should include assistance with ambulation in the care plan to help the client maintain stability while walking. Regular hearing tests (choice B) are not directly related to damage in the vestibular area of the vestibulocochlear nerve. While nausea (choice C) may occur due to vestibular damage, monitoring for it alone is not as essential as providing assistance with ambulation. Vision assessments (choice D) are important for assessing visual function but are not the priority when dealing with vestibular issues.
3. An 8-year-old boy has been diagnosed with a sex hormone deficiency and has begun a course of treatment with testosterone. What change in the boy's health status would necessitate a stop to the course of treatment?
- A. Excessive growth in height
- B. Signs of puberty
- C. Recurrent urinary tract infections
- D. Increased blood pressure
Correct answer: B
Rationale: In an 8-year-old boy with a sex hormone deficiency being treated with testosterone, the appearance of signs of puberty would necessitate stopping the treatment. Testosterone therapy in this case aims to supplement the deficient sex hormones but should not trigger premature puberty. Excessive growth in height (choice A) is not a typical reason to stop testosterone therapy. Recurrent urinary tract infections (choice C) and increased blood pressure (choice D) are not directly related to testosterone therapy in this context.
4. A patient presents with a rash from poison ivy. The nurse knows that this is which type of hypersensitivity?
- A. Type I
- B. Type II
- C. Type III
- D. Type IV
Correct answer: D
Rationale: A rash from poison ivy is an example of a type IV hypersensitivity reaction. Type IV hypersensitivity reactions are delayed cell-mediated immune responses involving T cells. This type of reaction is characterized by a delayed onset, typically occurring 48-72 hours after exposure to the antigen. Choice A, Type I hypersensitivity reactions, are immediate hypersensitivity reactions mediated by IgE antibodies. Choices B and C, Type II and Type III hypersensitivity reactions, involve antibody-mediated cytotoxicity and immune complex deposition, respectively, which are not characteristic of poison ivy-induced rashes.
5. Anemia of chronic inflammation is generally classified as:
- A. hypochromic and microcytic.
- B. hypochromic and macrocytic.
- C. normochromic and microcytic.
- D. normochromic and normocytic.
Correct answer: D
Rationale: Anemia of chronic inflammation is characterized by normochromic and normocytic red blood cells. In chronic inflammation, the body typically produces enough red blood cells, but they are often smaller and paler than normal (normocytic and normochromic). Choices A, B, and C are incorrect because hypochromic and microcytic, hypochromic and macrocytic, and normochromic and microcytic anemias are not typically associated with chronic inflammation.
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