Anatomy & Physiology
5th Edition
ISBN: 9780321861580
Author: Marieb, Elaine N.
Publisher: Pearson College Div
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Chapter 17, Problem 8RQ
The activity of the heart depends on intrinsic properties of cardiac muscle and on neural factors. Thus, (a) vagus nerve stimulation of the heart reduces heart rate, (b) sympathetic nerve stimulation of the heart decreases time available for ventricular filling, (c) sympathetic stimulation of the heart increases its force of contraction, (d) all of the above.
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Chapter 17 Solutions
Anatomy & Physiology
Ch. 17 - The heart is in the mediastinum. Just what is the...Ch. 17 - From inside to outside, list the layers of the...Ch. 17 - What is the purpose of the serous fluid inside the...Ch. 17 - What is the function of the papillary muscles and...Ch. 17 - Which side of the heart acts as the pulmonary...Ch. 17 - Which of the following statements are true? (a)...Ch. 17 - Prob. 7CYUCh. 17 - For each of the following, state whether it...Ch. 17 - Cardiac muscle cannot go into tetany. Why?Ch. 17 - Which part of the intrinsic conduction system...
Ch. 17 - Describe the electrical event in the heart that...Ch. 17 - The second heart sound is associated with the...Ch. 17 - If the mitral valve were insufficient, would you...Ch. 17 - During the cardiac cycle, there are two periods...Ch. 17 - Prob. 15CYUCh. 17 - What problem of cardiac output might ensue if the...Ch. 17 - When the semilunar valves are open, which of the...Ch. 17 - The portion of the intrinsic conduction system...Ch. 17 - An ECG provides information about (a) cardiac...Ch. 17 - The sequence of contraction of the heart chambers...Ch. 17 - The fact that the left ventricular wall is thicker...Ch. 17 - Prob. 6RQCh. 17 - In the heart, which of the following apply? (1)...Ch. 17 - The activity of the heart depends on intrinsic...Ch. 17 - Freshly oxygenated blood is first received by the...Ch. 17 - Describe the location and position of the heart in...Ch. 17 - Describe the pericardium and distinguish between...Ch. 17 - Trace one drop of blood from the time it enters...Ch. 17 - (a) Describe how heart contraction and relaxation...Ch. 17 - The refractory period of cardiac muscle is much...Ch. 17 - (a) Name the elements of the intrinsic conduction...Ch. 17 - Draw a normal ECG pattern. Label and explain the...Ch. 17 - Define cardiac cycle, and follow the events of one...Ch. 17 - What is cardiac output, and how is it calculated?Ch. 17 - Discuss how the Frank-Starling law of the heart...Ch. 17 - Prob. 1CCSCh. 17 - Prob. 2CCSCh. 17 - Prob. 3CCSCh. 17 - Prob. 4CCSCh. 17 - Prob. 5CCSCh. 17 - Prob. 6CCS
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