FUND.OF ANATOMY AND PHYSIOLOGY >IC<
10th Edition
ISBN: 9781323413920
Author: Martini
Publisher: PEARSON C
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Textbook Question
Chapter 20, Problem 10CP
Is the heart always pumping blood when pressure in the left ventricle is rising? Explain.
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Why would the ventricles need thicker walls for contraction (compared to the atria)?
What anatomical feature prevents the electrical signal from traveling directly from atrial muscle to ventricular muscle?
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Chapter 20 Solutions
FUND.OF ANATOMY AND PHYSIOLOGY >IC<
Ch. 20 - Prob. 1CPCh. 20 - Prob. 2CPCh. 20 - Why is the left ventricle more muscular than the...Ch. 20 - Prob. 4CPCh. 20 - Which structure of the heart is known as the...Ch. 20 - 6. If the cells of the SA node did not function,...Ch. 20 - Why is it important for impulses from the atria to...Ch. 20 - Give the technical terms for heart contraction and...Ch. 20 - List the phases of the cardiac cycle.Ch. 20 - Is the heart always pumping blood when pressure in...
Ch. 20 - What could cause an increase in the size of the...Ch. 20 - Define cardiac output.Ch. 20 - Prob. 13CPCh. 20 - Prob. 16CPCh. 20 - Prob. 14CPCh. 20 - Prob. 15CPCh. 20 - Prob. 17CPCh. 20 - Prob. 18CPCh. 20 - Prob. 20CPCh. 20 - The great cardiac vein drains blood from the heart...Ch. 20 - The autonomic centers for cardiac function are...Ch. 20 - Prob. 5RQCh. 20 - Prob. 6RQCh. 20 - The heart is surrounded by the (a) pleural cavity,...Ch. 20 - The cardiac skeleton of the heart has which two of...Ch. 20 - Cardiac output is equal to the (a) difference...Ch. 20 - Identify the superficial structures in the...Ch. 20 - Identify the structures in the following diagram...Ch. 20 - During diastole, a chamber of the heart (a)...Ch. 20 - During the cardiac cycle, the amount of blood...Ch. 20 - What role do the chordae tendineae and papillary...Ch. 20 - Describe the three distinct layers that make up...Ch. 20 - What are the valves in the heart, and what is the...Ch. 20 - Trace the normal pathway of an electrical impulse...Ch. 20 - What is the cardiac cycle? What phases and events...Ch. 20 - What three factors regulate stroke volume to...Ch. 20 - The cells of the conducting system differ from the...Ch. 20 - Which of the following is longer? (a) the...Ch. 20 - If the papillary muscles fail to contract, (a) the...Ch. 20 - Cardiac output cannot increase indefinitely...Ch. 20 - Describe the function of the SA node in the...Ch. 20 - What are the sources and significance of the four...Ch. 20 - Differentiate between stroke volume and cardiac...Ch. 20 - What factors influence cardiac output?Ch. 20 - What effect does sympathetic stimulation have on...Ch. 20 - Describe the effects of epinephrine,...Ch. 20 - Vern is suffering from cardiac arrhythmias and is...Ch. 20 - Harvey has a heart murmur in his left ventricle...Ch. 20 - The following measurements were made on two...Ch. 20 - Prob. 31RQCh. 20 - Prob. 1CCCh. 20 - Prob. 2CC
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- Which heart sound is longer in duration and louder, the first or the second heart sound. Briefly explain.arrow_forwardWhat causes the heart sounds S1 and S2?arrow_forwardAs blood in the ventricles surges back against the closed AV valves, the first heart sound ("lubb") can be heard. Why does this heart sound occur near the middle of the QRS complex in the ECG?arrow_forward
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