Human Biology: Concepts and Current Issues (8th Edition)
8th Edition
ISBN: 9780134042435
Author: Michael D. Johnson
Publisher: PEARSON
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Chapter 8, Problem 7AWK
Summary Introduction
To review:
Problems that lead to the occurrence of a ventricular septal defect.
Introduction:
The human heart has four chambers two ventricles and two atria. The left side of the heart deals with oxygenated blood that comes from lungs and the left ventricle pushes this oxygenated blood toward all over the body. And the right side of the heart deals with deoxygenated blood and right ventricle pushes this blood toward the lungs. These two sides are separated from each other by a well-known septum.
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VSD, or ventricular septal defect, is a condition that accounts for half of all congenital cardiovascular anomalies. In this condition, a hole exists in the septum, the muscular wall between the ventricles, which allows blood from the right and left side of the heart to mix. What sort of problems might this condition cause?
Figure shows the conduction system of the heart that transmit the electrical impulses
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a) Referring to the Figure , which part of the heart's electrical conduction is known as
the “pacemaker” of the heart?
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The exact cause of blood clotting in the left atrium of the heart during atrial fibrillation (AF) is not known. In part it might be due to blood stasis (not moving) or it may result in combination with endothelial cells damage.
(A) What are the potential mechanisms that might drive clotting and what markers might you look for in the blood to predict potential risk?
(B) Other than treating the arrhythmia, what other pharmacological intervention might be provided to AF sufferers?
Chapter 8 Solutions
Human Biology: Concepts and Current Issues (8th Edition)
Ch. 8 -
1. Who do you want to help you decide which...Ch. 8 - Do you think cost-effectiveness should be a part...Ch. 8 -
1. Why is it so important that the heart always...Ch. 8 - Compare and contrast the structures and functions...Ch. 8 - Prob. 3CRCh. 8 - Describe the function of the heart valves.Ch. 8 - Compare the functions of the pulmonary circuit and...Ch. 8 -
6. Describe the cardiac cycle of relaxation and...Ch. 8 - Describe the function of the SA and AV nodes as...Ch. 8 - Prob. 8CR
Ch. 8 - Prob. 9CRCh. 8 - Prob. 10CRCh. 8 -
1. _______ carry blood away from the heart and...Ch. 8 - Prob. 2TYCh. 8 - Which of the choices represents the order of...Ch. 8 - Prob. 4TYCh. 8 - Prob. 5TYCh. 8 - Prob. 6TYCh. 8 - Prob. 7TYCh. 8 - A pacemaker is used to correct: a. coronary artery...Ch. 8 - Prob. 9TYCh. 8 - Prob. 10TYCh. 8 - Prob. 11TYCh. 8 - Prob. 12TYCh. 8 - Prob. 13TYCh. 8 - Prob. 14TYCh. 8 - Prob. 15TYCh. 8 - Prob. 1AWKCh. 8 - When a coronary artery bypass graft (CABG) is...Ch. 8 - Soldiers have to stand in formation at full...Ch. 8 - Prob. 4AWKCh. 8 - Prob. 5AWKCh. 8 - Ventricular fibrillation is a potentially fatal...Ch. 8 - Prob. 7AWKCh. 8 - Last night, you and your roommate were sound...
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- 1. In a healthy heart, which of the following statements is TRUE?A) Depolarization of the interventricular septum occurs from right to left.B)The right ventricle depolarizes before the left ventricle.C) The wave of depolarization passes more quickly through the AV node than the Purkinje fibers.D) The QRS complex is predominantly upright in Leads I and II. E) The mean electrical axis is generally between +100 and +150 degrees. 2. Which of the following is most likely to be present on the resting EKG recording of a patient with AV node damage?A) An R-R interval of 0.52 seconds at rest.B) A P-R interval of 0.28 seconds at rest.C)An inverted T waveD) Normal sinus rhythmarrow_forwardIn the calculation of the heart rate using the number 300 method in the ECG, where did the number 300 come from? Why exactly was this method adopted?arrow_forwardCompare and contrast the structure of the heart wall with that of arteries. Which three structures are homologous?arrow_forward
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