The nurse is assisting in a seminar for newly licensed nurses, teaching about characteristics of the heart. The nurse shows understanding of the heart when she states that the innermost layer of the heart is called the.
chambers.
pericardium.
epicardium.
endocardium.
The Correct Answer is D
Choice A rationale:
Chambers refer to the four compartments of the heart, not a layer of the heart.
Choice B rationale:
Pericardium is the sac that surrounds the heart, not a layer of the heart itself.
Choice C rationale:
Epicardium is the outermost layer of the heart, not the innermost.
Choice D rationale:
Endocardium is indeed the innermost layer of the heart, lining the inner surfaces of the heart chambers and valves.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
Swollen, bleeding gums are a common symptom of Vitamin C deficiency, also known as scurvy. Vitamin C is essential for the health of gums and teeth.
Choice B rationale:
Pale, brittle nails are not typically associated with Vitamin C deficiency. They can be a sign of other conditions such as iron deficiency anemia.
Choice C rationale:
Inflammation of the tongue, or glossitis, can be caused by various conditions, including certain vitamin deficiencies, but it’s not a common sign of Vitamin C deficiency.
Choice D rationale:
Dry, red conjunctiva can be a symptom of various eye conditions, but it’s not typically associated with Vitamin C deficiency.
Correct Answer is B
Explanation
Choice A rationale:
Elevated potassium levels are not a specific indicator of a myocardial infarction (MI). They could be due to other conditions like kidney disease.
Choice B rationale:
Elevated CK-MB and Troponin levels are indeed indicators of an MI. These proteins are released into the blood when heart muscle is damaged.
Choice C rationale:
An elevated lipid profile is a risk factor for heart disease, but it does not indicate an acute MI.
Choice D rationale:
An elevated WBC count could indicate an infection or inflammation, but it is not a specific indicator of an MI.
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