Nursing Elites

1. Which structure serves as the major chemoreceptor of the heart?

• A. Carotid body
• B. Aortic body
• C. Vagus nerve
• D. SA node

Correct answer: A

Rationale: The correct answer is A, the carotid body. The carotid body is the major chemoreceptor of the heart responsible for detecting changes in blood oxygen, carbon dioxide, and pH levels. This specialized structure helps regulate the cardiovascular system's response to maintain appropriate oxygen levels in the blood. Choices B, C, and D are incorrect as they are not directly involved in chemoreception in the heart. The aortic body is primarily involved in blood pressure regulation, the vagus nerve is a cranial nerve responsible for parasympathetic innervation, and the SA node is known as the heart's natural pacemaker.

2. Which condition involves the body's immune system attacking the lungs and kidneys, causing severe respiratory and renal damage?

• A. Goodpasture syndrome
• B. Sarcoidosis
• C. Wegener's granulomatosis
• D. Interstitial lung disease

Correct answer: A

Rationale: Goodpasture syndrome is the correct answer. It is an autoimmune disease characterized by the immune system attacking the lungs and kidneys, leading to bleeding in the lungs and kidney failure. Sarcoidosis primarily affects the lungs and lymph nodes, not the kidneys. Wegener's granulomatosis affects the lungs, sinuses, and kidneys, but it is characterized by inflammation of blood vessels. Interstitial lung disease involves scarring of the lung tissue, not direct immune system attacks on the lungs and kidneys.

3. What is the average cardiac output?

• A. Approximately 4 to 6 L per minute
• B. Approximately 4 to 8 L per minute
• C. Approximately 5 to 8 L per minute
• D. Approximately 3 to 7 L per minute

Correct answer: B

Rationale: The correct answer is B: Approximately 4 to 8 L per minute. Cardiac output is defined as the volume of blood the heart pumps per minute, typically ranging between 4 to 8 liters. Choices A, C, and D provide ranges that are either too narrow or outside the standard average values for cardiac output, making them incorrect.

4. The client on nitroglycerin complains of a headache. How does the nurse explain this?

• A. This is a normal side effect of nitroglycerin.
• B. This is an allergic reaction to nitroglycerin.
• C. This is an indication of overdose.
• D. This is a sign of heart failure.

Correct answer: A

Rationale: The correct answer is A: 'This is a normal side effect of nitroglycerin.' Headaches are a common side effect of nitroglycerin due to vasodilation. Choice B is incorrect because allergic reactions to nitroglycerin typically present with symptoms like rash, itching, or shortness of breath. Choice C is incorrect as an overdose of nitroglycerin would likely present with symptoms beyond just a headache. Choice D is incorrect because headaches related to nitroglycerin are not indicative of heart failure.

5. When administering enoxaparin (Lovenox) to a client, what is the most important lab value to monitor?

• A. Platelet count
• B. aPTT
• C. Hemoglobin
• D. INR

Correct answer: A

Rationale: The correct answer is A: Platelet count. When administering enoxaparin (Lovenox), it is crucial to monitor the platelet count because enoxaparin can cause a rare but serious side effect known as heparin-induced thrombocytopenia, which is a decrease in platelet count that can lead to increased risk of bleeding. Monitoring the platelet count allows for early detection of this potential complication. Choices B, C, and D are incorrect because aPTT, Hemoglobin, and INR are not the most important lab values to monitor specifically when administering enoxaparin.

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