Auscultation of the heart sounds will result in a lubb-dupp sound when using the bell and the diaphragm of the stethoscope. The lub part of the sound is caused by the:
opening of the AV valves
closing of the semilunar valves
closing of the AV valves
opening of the semilunar valves
The Correct Answer is C
A. Opening of the AV valves – The AV (atrioventricular) valves open silently during diastole; they do not create the "lub" sound.
B. Closing of the semilunar valves – The closing of the semilunar valves (aortic and pulmonary) produces the "dupp" sound, not the "lub."
C. Closing of the AV valves – The first heart sound (S1), or "lub," occurs when the mitral and tricuspid (AV) valves close at the beginning of systole.
D. Opening of the semilunar valves – The semilunar valves open silently during ventricular contraction; they do not produce the "lub" sound.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Exudate – Exudate is fluid rich in proteins and cells that escapes from blood vessels due to inflammation or injury.
B. Pus – Pus is a thick, yellowish-white exudate containing dead cells and bacteria, specifically associated with infection.
C. Drainage – Drainage is a general term for any fluid leaving the body, including exudate, blood, or serous fluid.
D. Discharge – Discharge is a broader term referring to any material exiting the body, including normal secretions and infectious material.
Correct Answer is D
Explanation
A. Systemic – A systemic assessment is a head-to-toe examination that evaluates all body systems. The patient’s condition change requires a more targeted approach.
B. Specialized – A specialized assessment refers to an in-depth evaluation of a specific condition, usually performed by a specialist.
C. Individualized – While all assessments should be individualized, this term does not specifically describe the type of assessment needed in response to a sudden change in condition.
D. Focused – A focused assessment is performed when there is a specific change in the patient’s condition, such as new-onset dyspnea. It concentrates on the affected system (e.g., respiratory system) to determine the underlying cause.
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