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MSN 570 Advanced Pathophysiology Final 2024
1. Which of the following tests is recommended for lung cancer screening?
- A. Chest X-ray
- B. Pulmonary function test
- C. Computed tomography (CT) scan
- D. Magnetic resonance imaging
Correct answer: Computed tomography (CT) scan
Rationale: The correct answer is Computed tomography (CT) scan. When screening for lung cancer, CT scans are recommended over chest X-rays due to their higher sensitivity in detecting lung nodules and early-stage cancers. Pulmonary function tests are not used for screening lung cancer but rather to assess lung function. Magnetic resonance imaging is not the preferred imaging modality for routine lung cancer screening, as CT scans are more commonly used.
2. What causes hepatic encephalopathy?
- A. A brain infection
- B. Increased ammonia levels in the bloodstream
- C. Decreased albumin blood levels
- D. Untreated chronic bronchitis
Correct answer: B
Rationale: Hepatic encephalopathy is caused by increased ammonia levels in the bloodstream. Ammonia, a byproduct of protein metabolism normally processed by the liver, accumulates in the bloodstream when the liver is unable to function properly. This excess ammonia affects brain function, leading to symptoms of hepatic encephalopathy. Choices A, C, and D are incorrect because they do not directly relate to the pathophysiology of hepatic encephalopathy.
3. A 30-year-old woman presents with joint pain, a malar rash, and photosensitivity. Which of the following is the most likely diagnosis?
- A. Rheumatoid arthritis
- B. Systemic lupus erythematosus
- C. Psoriatic arthritis
- D. Dermatomyositis
Correct answer: B
Rationale: The correct answer is B: Systemic lupus erythematosus. Joint pain, a malar rash, and photosensitivity are classic symptoms of systemic lupus erythematosus. Choice A, Rheumatoid arthritis, is incorrect as it typically presents with symmetric joint involvement and morning stiffness. Psoriatic arthritis (Choice C) is characterized by joint pain associated with psoriasis, which is not described in the case. Dermatomyositis (Choice D) presents with muscle weakness, skin rash, and elevated muscle enzymes, different from the symptoms presented in the case.
4. What aspect of this woman's current health status would contraindicate the use of oral contraceptives?
- A. The woman has a diagnosis of type 2 diabetes.
- B. The woman has asthma and uses inhaled corticosteroids and bronchodilators.
- C. The woman has a family history of breast cancer.
- D. The woman takes an antiplatelet medication for coronary artery disease.
Correct answer: A
Rationale: The correct answer is A. Women with type 2 diabetes are at higher risk of developing cardiovascular complications. Oral contraceptives further increase this risk due to their potential effects on blood pressure, lipid metabolism, and clotting factors. Choice B is incorrect as inhaled corticosteroids and bronchodilators do not contraindicate the use of oral contraceptives. Choice C is incorrect as a family history of breast cancer does not directly contraindicate the use of oral contraceptives. Choice D is also incorrect as taking an antiplatelet medication for coronary artery disease does not necessarily contraindicate the use of oral contraceptives.
5. A 50-year-old female was diagnosed with sideroblastic anemia. Which of the following assessment findings would most likely occur?
- A. Bronze-colored skin
- B. Decreased iron
- C. Normochromic erythrocytes
- D. Aplastic bone marrow
Correct answer: A
Rationale: The correct answer is A: 'Bronze-colored skin.' Sideroblastic anemia is characterized by excess iron deposition, leading to bronze-colored skin. This occurs due to the abnormal accumulation of iron in tissues. Choices B, C, and D are incorrect because sideroblastic anemia does not typically present with decreased iron levels, normochromic erythrocytes, or aplastic bone marrow.
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