Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 14.4, Problem 32CC
Summary Introduction
To determine: The effect of catecholamines on the contractile cells of the heart.
Introduction: The circulatory system and cardiovascular systems form the two very important of the different organ systems in the body. The system is responsible for pumping the blood carrying nutrients and oxygen and helping to remove waste products from the body.
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Chapter 14 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 14.1 - A cardiovascular system has what three major...Ch. 14.1 - What is the difference between (a) the pulmonary...Ch. 14.2 - Which is more important for determining flow...Ch. 14.2 - The two identical tubes below have the pressures...Ch. 14.2 - All four tubes below have the same driving...Ch. 14.2 - Two canals in Amsterdam are identical in size, but...Ch. 14.3 - What prevents electrical signals from passing...Ch. 14.3 - Prob. 8CCCh. 14.3 - Prob. 9CCCh. 14.3 - Compare the receptors and channels involved in...
Ch. 14.3 - If a myocardial contractile cell is placed in...Ch. 14.3 - A drug that blocks all Ca2+ channels in the...Ch. 14.3 - Which ions moving in what directions cause the...Ch. 14.3 - At the molecular level, what is happening during...Ch. 14.3 - Lidocaine is a molecule that blocks the action of...Ch. 14.3 - What does increasing K+ permeability do to the...Ch. 14.3 - A new cardiac drug called ivabradine selectively...Ch. 14.3 - Do you think that the Ca2+ channels in...Ch. 14.3 - What happens to the action potential of a...Ch. 14.3 - In an experiment, the vagus nerve, which carries...Ch. 14.4 - Name two functions of the AV node. What is the...Ch. 14.4 - Prob. 22CCCh. 14.4 - Occasionally an ectopic pacemaker {ktopos, out of...Ch. 14.4 - Prob. 24CCCh. 14.4 - Which chamberatrium or ventriclehas higher...Ch. 14.4 - Prob. 26CCCh. 14.4 - Prob. 27CCCh. 14.4 - Prob. 28CCCh. 14.4 - Prob. 29CCCh. 14.4 - Why does ventricular pressure shoot up suddenly at...Ch. 14.4 - Prob. 31CCCh. 14.4 - Prob. 32CCCh. 14.4 - A persons aortic valve opening has become...Ch. 14 - What contributions to understanding the...Ch. 14 - List three functions of the cardiovascular system.Ch. 14 - Prob. 3RQCh. 14 - Prob. 4RQCh. 14 - Prob. 5RQCh. 14 - Prob. 6RQCh. 14 - Prob. 7RQCh. 14 - Distinguish between the two members of each of the...Ch. 14 - Prob. 9RQCh. 14 - Prob. 10RQCh. 14 - What is the proper term for each of the following?...Ch. 14 - List the events of the cardiac cycle in sequence,...Ch. 14 - Prob. 13RQCh. 14 - Compare and contrast the structure of a cardiac...Ch. 14 - Prob. 15RQCh. 14 - Correlate the waves of an ECG with mechanical...Ch. 14 - Prob. 17RQCh. 14 - List and briefly explain four types of information...Ch. 14 - Define inotropic effect. Name two drugs that have...Ch. 14 - Prob. 20RQCh. 14 - Police Captain Jeffers has suffered a myocardial...Ch. 14 - Prob. 22RQCh. 14 - Prob. 23RQCh. 14 - Police Captain Jeffers in question 21 has an...Ch. 14 - Prob. 25RQCh. 14 - Prob. 26RQCh. 14 - Prob. 27RQCh. 14 - A person has a total blood volume of 5 L. Of this...
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- Compare action potential of pacemaker and non-pacemaker (working) myocardial cells?arrow_forwardConsidering the function of the heart, why is it important that the myocardium cannot be tetanized?arrow_forwardGiven the role of potassium in myocardial cell action potentials, explain how hyperkalemia can stop the heart. Make sure to explain in terms of ion movementsarrow_forward
- Explain why part of the myocardium is nonfunctionalfollowing myocardial infarction.arrow_forwardRepolarization of ventricular myocardiocytes is caused by ______ the cells through voltage-gated channels. A potassium entering B potassium leaving C sodium entering D sodium leaving E calcium enteringarrow_forwardWhat major movements of ions account for each phase of the action potential of a typical myocardial cell?arrow_forward
- Draw and label channel of events of the myocardial action potential with correct axis and units. (Don't get this one confused with a cardiac Pacemaker AP)arrow_forwardExplain how two different heart muscle diseases (dilated cardiomyopathy and hypertrophic cardiomyopathy) can end up affecting cardiac output in the same wayarrow_forwardAlthough not considered the primary pacemaker of the heart, the atrioventricular node can indeed be considered as playing SOME role in setting the rhythm of the heart (kind of a secondary pacemaker). Explain how/why.arrow_forward
- In the initial stages of ventricular fibrillation (during which the heart produces no functional contraction), tissue perfusion in the heart actually increases. Explain.arrow_forwardIf a patients blood test showed high levels of myocardium-specific troponin, and her ECG showed ST elevation, what would be occurring within the heart that would produce both of these results?arrow_forwardExplain how the heart is a double pump and why this is significantarrow_forward
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