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 A
Explanation
Choice A rationale
Standing frequently can help promote blood flow in the legs, which can be beneficial for a patient with arterial insufficiency. This is because standing engages the muscles in the legs, which helps push blood back up towards the heart.
Choice B rationale
Walking without shoes is not typically recommended for patients with arterial insufficiency. This is because these patients often have reduced sensation in their feet and may not notice if they step on something sharp or if a wound develops.
Choice C rationale
Vigorous massage of the legs is not usually recommended for patients with arterial insufficiency. While gentle massage can help promote blood flow, vigorous massage could potentially damage the arteries further.
Choice D rationale
Allowing the legs to dangle dependently often is not typically recommended for patients with arterial insufficiency. This position can actually increase swelling and discomfort in the legs.
Correct Answer is C
Explanation
Choice A rationale
Daily alcohol use is not a direct contraindication for Propranolol (Inderal), but it’s important to note that alcohol can increase the blood pressure-lowering effect of propranolol, which can make you feel dizzy or lightheaded.
Choice B rationale
Propranolol is often used in the treatment of conditions related to heart disease, such as hypertension and angina, and it can also be used in the secondary prevention of myocardial infarction.
Choice C rationale
Asthma is a contraindication for the use of Propranolol (Inderal). Propranolol can cause bronchial constriction by blocking beta-adrenergic receptors in the lungs, which can exacerbate asthma symptoms.
Choice D rationale
Peptic ulcer disease is not a direct contraindication for Propranolol (Inderal). However, like any medication, Propranolol should be used with caution in patients with a history of peptic ulcer disease.
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