Between the second sound of one beat and the first sound of the next beat the _____. Asemilunar valves are opened Bventricles are depolarized and contracting Cventricles fill with blood Datrioventricular valves are closed

Answered: Between the second sound of one beat…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

Between the second sound of one beat and the first sound of the next beat the _____.

	A	semilunar valves are opened
	B	ventricles are depolarized and contracting
	C	ventricles fill with blood
	D	atrioventricular valves are closed

Expert Solution

Step 1 Introduction on the heart sounds:

Heart sounds are generated by blood flowing in and out of the heart’s chambers through the valves as they open and close. Listening to the heart sounds through a stethoscope (auscultation) is one of the first steps a physician takes in evaluating a patient’s medical condition. Blood flow creates vibrations in the heart chambers and valves which produce audible sounds that can be heard through a stethoscope. Smooth, low-resistance blood flow is called a laminar flow. When the flow is rough with high resistance it is known as a turbulent flow.