Afterload is most accurately described by which of the following?
Fluid volume status.
Atrial contraction (kick).
Resistance to blood flow.
Myocardial compliance.
The Correct Answer is C
Choice A reason: Fluid volume status affects preload, not afterload.
Choice B reason: Atrial contraction contributes to filling of the ventricles, not to afterload.
Choice C reason: Afterload is the resistance left ventricular must overcome to circulate blood, which is accurately described as resistance to blood flow.
Choice D reason: Myocardial compliance refers to the elasticity of the heart muscle, which affects how the heart fills, not the resistance it must overcome to eject blood.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: Placing suction equipment at the bedside is a preparatory measure but not a preventive intervention for pulmonary complications.
Choice B reason: Performing ROM exercises is beneficial for overall mobility but does not directly prevent pulmonary complications.
Choice C reason: Administering an expectorant may help clear secretions but is not the primary preventive measure for pulmonary complications.
Choice D reason: Encouraging the use of incentive spirometry is a proven intervention to prevent pulmonary complications by promoting lung expansion and preventing atelectasis, especially in patients with a history of smoking.
Correct Answer is B
Explanation
Choice A reason: Stroke Volume refers to the amount of blood pumped by the left ventricle of the heart in one contraction, not to the regulation of fluid volume and cardiac output.
Choice B reason: Renin-Angiotensin-Aldosterone-System (RAAS) is responsible for vasoconstriction, sodium retention, and water reabsorption, which helps to increase circulating fluid volume and cardiac output.
Choice C reason: Brain and Atrial natriuretic peptides (BNP & ANP) actually work to decrease blood volume and pressure, not increase them.
Choice D reason: Erythropoietin primarily stimulates red blood cell production and does not directly affect fluid volume or cardiac output.
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