FUNDAMENTALS A&P BUNDLE W/LAB MANUAL
11th Edition
ISBN: 9780135732403
Author: Martini
Publisher: PEARSON
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Textbook Question
Chapter 20, Problem 3CP
Why is the left ventricle more muscular than the right ventricle?
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Why would the ventricles need thicker walls for contraction (compared to the atria)?
if the impulse is coming inferiorly from the SA node then how do the ventricles contract inferior to superior?
What structure stops blood in the left ventricle from mixing with blood in the right ventricle ?
Chapter 20 Solutions
FUNDAMENTALS A&P BUNDLE W/LAB MANUAL
Ch. 20 - Prob. 1CPCh. 20 - Prob. 2CPCh. 20 - Why is the left ventricle more muscular than the...Ch. 20 - Define autorhythmicity.Ch. 20 - Which structure of the heart is known as the...Ch. 20 - Prob. 6CPCh. 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. 14CPCh. 20 - Prob. 15CPCh. 20 - Prob. 16CPCh. 20 - Prob. 17CPCh. 20 - The great cardiac vein drains blood from the heart...Ch. 20 - The autonomic centers for cardiac function are...Ch. 20 - Prob. 3RQCh. 20 - The simple squamous epithelium covering the heart...Ch. 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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- What is the significance of the difference in thickness of the ventricular walls?arrow_forwardwhat is the strucure of left ventriclearrow_forwardExplain why the walls of the atria are thinner than those of the ventricles, and why the wall of the right ventricle is relatively thin when compared to the wall of the left ventricle.arrow_forward
- Can the intraventricular septum prevents the electrical activity from stimulating the heart in a superior and inferior directional manner? Yes or Noarrow_forwardName the blood vessels that leaves right ventricle.arrow_forwardWhy is it important that the AV node delay the electricalimpulse moving from the SA node and the atria to theventricles?arrow_forward
- What is the functional significance of the difference in thickness of the ventricular walls?arrow_forwardWhy doesn't shortening the diastolic time decrease ventricular filling and thus decrease cardiac output?arrow_forwardWhat is the measured thickness of the left ventricle and the right ventricle walls?arrow_forward
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