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47. Choose the FALSE statement regarding the physical principles of auscultation with a stethoscope: A. As the blood exits through the aortic and mitral orifices, the blood is ejected at high speed from the left heart. B. The ejection of blood through the mitral and aortic orifice as well as the closing of the mitral valves can be auscultated in the aortic focus and in the mitral focus in the heart area. C. In stenoses the caliber of the vessel decreases while in aneurysms the caliber increases. D. Stenoses are "silent areas" to the stethoscope, and aneurysms are areas that can be objectified by auscultation. E. "Silent abdomen" is a physiologically normal clinical sign that does not require special attention.
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