Anatomy & Physiology
1st Edition
ISBN: 9781938168130
Author: Kelly A. Young, James A. Wise, Peter DeSaix, Dean H. Kruse, Brandon Poe, Eddie Johnson, Jody E. Johnson, Oksana Korol, J. Gordon Betts, Mark Womble
Publisher: OpenStax College
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Textbook Question
Chapter 19, Problem 15RQ
The first heart sound represents which portion of the cardiac cycle?
- atrial systole
- ventricular systole
- closing of the atrioventricular valves
- closing of the semilunar valves
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Which process is being illustrated in the diagram (see picture)?
Semilunar
valves closed
Atrioventricular
valve open
Aorta
Superior
vena cava
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atrium
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wentricie
Atroventricular
valve open
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ventricle
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vena cava
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The second heart sound is caused by
the ventricles contracting
opening of the AV valves
closing of the semilunar valves
closing of the AV valves
during the four phases of the cardiac cycle. Which valves open/close during these phases?
Ventricular
Isovolumetric
Ventricular
Isovolumetric
Filling
Contraction
Ejection
Relaxation
Blood Flow
Low
Ventricular
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Ventricular
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Aortic Pressure
Which valves
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the beginning of
Chapter 19 Solutions
Anatomy & Physiology
Ch. 19 - Visit this site...Ch. 19 - Which of the following is not important in...Ch. 19 - Which valve separates the left atrium from the...Ch. 19 - Which of the following lists the valves in the...Ch. 19 - Which chamber initially receives blood from the...Ch. 19 - The ________ layer secretes chemicals that help to...Ch. 19 - The myocardium would be the thickest in the...Ch. 19 - In which septum is it normal to find openings in...Ch. 19 - Which of the following is unique to cardiac muscle...Ch. 19 - The influx of which ion accounts for the plateau...
Ch. 19 - Which portion of the ECG corresponds to...Ch. 19 - Which component of the heart conduction system...Ch. 19 - The cardiac cycle consists of a distinct...Ch. 19 - Most blood enters the ventricle during ________....Ch. 19 - The first heart sound represents which portion of...Ch. 19 - Ventricular relaxation immediately follows...Ch. 19 - The force the heart must overcome to pump blood is...Ch. 19 - The cardiovascular centers are located in which...Ch. 19 - In a healthy young adult, what happens to cardiac...Ch. 19 - What happens to preload when there is venous...Ch. 19 - Which of the following is a positive inotrope? Na+...Ch. 19 - The earliest organ to form and begin function...Ch. 19 - Of the three germ layers that give rise to all...Ch. 19 - The two tubes that eventually fuse to form the...Ch. 19 - Which primitive area of the heart will give rise...Ch. 19 - The pulmonary trunk and aorta are derived from...Ch. 19 - Describe how the valves keep the blood moving in...Ch. 19 - Why is the pressure in the pulmonary circulation...Ch. 19 - Why is the plateau phase so critical to cardiac...Ch. 19 - How does the delay of the impulse at the...Ch. 19 - How do gap junctions and intercalated disks aid...Ch. 19 - Why do the cardiac muscles cells demonstrate...Ch. 19 - Describe one cardiac cycle, beginning with both...Ch. 19 - Why does increasing EDV increase contractility?Ch. 19 - Why is afterload important to cardiac function?Ch. 19 - Why is it so important for the human heart to...Ch. 19 - Describe how the major pumping chambers, the...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Figure 40.11 Which of the following statements about the heart is false? The mitral valve separates the left ventricle from the left atrium. Blood travels through the bicuspid valve to the left atrium. Both the aortic and the pulmonary valves are semilunar valves. The mitral valve is an atrioventricular valve.arrow_forwardLabel the hearts main parts in the diagram below.arrow_forwardClusters of neurons in the medulla oblongata that regulate blood pressure are known collectively as ________. baroreceptors angioreceptors the cardiomotor mechanism the cardiovascular centerarrow_forward
- Which heart chamber has the thickest wall? a. right atrium c. left atrium b. right ventricle d. left ventriclearrow_forwardThe contraction phase of the heartbeat is ______; the relaxation phase is _______.arrow_forwardVisit this site (http://openstaxcollege.org/l/heartvalve) to observe an echocardiogram of actual heart valves opening and closing. Although much of the heart has been removed from this gif loop so the chordae tendineae are not visible, why is their presence more critical for the atrioventricular valves (tricuspid and mitral) than the semilunar (aortic and pulmonary) valves?arrow_forward
- Put these phases of the cardiac cycle in the correct order. opening of the semilunar valves isovolumetric contraction atrial systole begins closure of the AV valves ventricular filling is complete ventricular systole begins ventricular relaxation ventricular ejectionarrow_forwardThe heart is resting during Select one: ventricular systole. the ejection period. ventricular diastole. atrial systole.arrow_forwardThe first sound of a cardiac cycle occurs when the _____ and ______ (select them in alphabetical order) are closing. The second sound of a cardicac cycle occurs when the _______ and ________ (select them in alphabetical order) are closing. Word Options for Blanks: (some may not be used, some may be used more than once) aorta aortic valve bicuspid valve coronary sinus inferior vena cava left atrium left ventricle pulmonary arteries pulmonary trunk pulmonary valve pulmonary veins right atrium right ventricle superior vena cava tricuspid valvearrow_forward
- During which phase of the cardiac cycle do the ventricles begin to contract while the semilunar valves remain closed ? Group of answer choices Isovolumetric contraction Ventricular ejection Ventricular fillingarrow_forwardThe first heart sound represents which portion of thecardiac cycle?a. atrial systoleb. ventricular systolec. closing of the atrioventricular valvesd. closing of the semilunar valvesarrow_forwardPhases of the Cardiac Cycle Events associated with Atrial Systole Ventricular Systole Diastole Atria Ventricles AV valves Semilunar valves Associated ECG wave in a normal rhythmarrow_forward
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