A patient with CAD is asking the nurse about the mechanisms of the heart.
It would be appropriate for the nurse to respond that when the left ventricle contracts, it pushes blood through the semilunar valve to the:
Pulmonary vein.
Pulmonary artery.
Aorta.
Inferior vena cava.
The Correct Answer is C
Choice A rationale:
This statement is incorrect because the pulmonary vein carries oxygenated blood from the lungs to the left atrium, not from the left ventricle.
Choice B rationale:
This statement is incorrect because the pulmonary artery carries deoxygenated blood from the right ventricle to the lungs, not from the left ventricle.
Choice C rationale:
This statement is correct. When the left ventricle contracts, it pushes blood through the aortic semilunar valve into the aorta, the largest artery in the body.
Choice D rationale:
This statement is incorrect because the inferior vena cava carries deoxygenated blood from the lower half of the body to the right atrium, not from the left ventricle.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C","E"]
Explanation
The correct answers are Choice B: "I must stop smoking.", Choice C: "I am limiting my intake of fast foods.", and Choice E: "I need to monitor my weight."
Choice A rationale:
Stopping alcohol consumption can have various health benefits, but moderate alcohol consumption is not a primary risk factor for coronary artery disease. Instead, excessive drinking is more concerning.
Choice B rationale:
Smoking is a significant risk factor for coronary artery disease. Quitting smoking greatly reduces the risk and improves overall cardiovascular health.
Choice C rationale:
Limiting fast food intake is an important dietary change, as fast foods are often high in unhealthy fats, salt, and calories, which can contribute to coronary artery disease.
Choice D rationale:
The statement "I should lower my HDL cholesterol level" is incorrect. HDL cholesterol is considered "good" cholesterol and helps to protect against heart disease. Therefore, lowering HDL cholesterol would not be beneficial.
Choice E rationale:
Monitoring and maintaining a healthy weight is crucial for reducing the risk of coronary artery disease. Excess weight, particularly around the abdomen, is a known risk factor.
Correct Answer is B
Explanation
Choice A rationale:
Metabolic alkalosis is incorrect because it would present with a high pH and high HCO3. This client’s pH is low, indicating acidosis, not alkalosis.
Choice B rationale:
Respiratory acidosis is correct. It is characterized by a low pH and high PaCO2, as seen in this client’s results. This condition occurs when the lungs can’t remove enough CO2, causing it to build up in the blood and lower the pH.
Choice C rationale:
Metabolic acidosis is incorrect because it would present with a low pH and low HCO3. This client’s HCO3 is normal.
Choice D rationale:
Respiratory alkalosis is incorrect because it would present with a high pH and low PaCO2. This client’s pH is low and PaCO2 is high.
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