Which sequence best describes the direction of blood flow through the heart and lungs?
Vena cava → Right atrium → Right ventricle → Lungs → Pulmonary artery → Left atrium → Left ventricle.
Right atrium → Right ventricle → Pulmonary vein → Lungs → Pulmonary artery → Left atrium → Left ventricle.
Right atrium → Right ventricle → Pulmonary artery → Lungs → Pulmonary vein → Left atrium → Left ventricle.
Right atrium → Right ventricle → Lungs → Pulmonary vein → Pulmonary artery → Left atrium → Left ventricle → Vena cava.
The Correct Answer is C
Choice A rationale
This sequence is incorrect because it suggests that blood goes from the lungs to the pulmonary artery, which is not accurate. The pulmonary artery carries deoxygenated blood from the heart to the lungs.
Choice B rationale
This sequence is incorrect because it suggests that blood goes from the pulmonary vein to the lungs, which is not accurate. The pulmonary vein carries oxygenated blood from the lungs to the heart.
Choice C rationale
This sequence correctly describes the direction of blood flow through the heart and lungs. Deoxygenated blood enters the right atrium, goes to the right ventricle, then is sent to the lungs via the pulmonary artery. After picking up oxygen in the lungs, the blood returns to the heart via the pulmonary vein, entering the left atrium, then the left ventricle, from where it is pumped out to the rest of the body.
Choice D rationale
This sequence is incorrect because it suggests that blood goes from the pulmonary vein to the pulmonary artery, which is not accurate. The pulmonary vein carries oxygenated blood from the lungs to the heart, and the pulmonary artery carries deoxygenated blood from the heart to the lungs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
While obesity can contribute to hypertension and other cardiovascular diseases, it is not a contraindication for the use of propranolol. Weight management would be part of the overall treatment plan for hypertension, but it would not prevent the use of this medication.
Choice B rationale
Age is not a contraindication for the use of propranolol. While older adults may be more susceptible to certain side effects of the medication, age alone would not prevent a patient from taking propranolol.
Choice C rationale
Diabetes is a contraindication for the use of propranolol. Propranolol is a non-selective beta- blocker, which can mask symptoms of hypoglycemia, a common condition in people with diabetes. Therefore, it’s generally not recommended for people with diabetes.
Choice D rationale
Race is not a contraindication for the use of propranolol. While there are some differences in how people of different races may respond to certain medications, race alone would not prevent a patient from taking propranolol.
Correct Answer is C
Explanation
The patient with a blood pressure of 116/42 mm Hg has a mean arterial pressure (MAP) of approximately 67 mm Hg, which is less than the standard policy of 70 mm Hg. This could indicate inadequate blood flow to the vital organs, necessitating notification of the healthcare provider.
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