HUMAN ANATOMY
6th Edition
ISBN: 9781260986037
Author: SALADIN
Publisher: MCG
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Chapter 20, Problem 5TYR
Summary Introduction
Introduction:
The heart is placed in the thoracic cavity in the mediastinum, between the lungs and deep to the sternum. It is tilted towards the left, from its superior to inferior midpoints. The heart is consisting ofthe myocardium. There are four heart chambers, which are referred to as left and right atria and left and right ventricles.
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The heart is resting during
Select one:
ventricular systole.
the ejection period.
ventricular diastole.
atrial systole.
A 60-year-old woman receives a coronary angiogram following a myocardial infarction in order to
evaluate the condition of her coronary circulation. Most blood draining from the heart wall
(myocardium) will return to the heart through which of the following structures?
Coronary sinus
Superior vena cava
Ascending aorta
Pulmonary veins
Inferior vena cava
What keeps the atrioventricular (AV) valves from being pushed open as the ventricles contract?
Pressure of blood pushing against the valves.
Contraction of the atria.
Closure of the semilunar valves.
Contraction of papillary muscles and tightening of chordae tendineae.
Chapter 20 Solutions
HUMAN ANATOMY
Ch. 20.1 - Answer the following questions to test you...Ch. 20.2 - Parts of the fibrous skeleton sometimes become...Ch. 20.2 - Prob. 3BYGOCh. 20.2 - Prob. 4BYGOCh. 20.2 - Answer the following questions to test you...Ch. 20.3 - Answer the following questions to test you...Ch. 20.3 - Prob. 7BYGOCh. 20.3 - Prob. 8BYGOCh. 20.3 - Answer the following questions to test you...Ch. 20.4 - Why should mitochondria be large and more abundant...
Ch. 20.4 - Answer the following questions to test you...Ch. 20.4 - Answer the following questions to test you...Ch. 20.4 - Prob. 12BYGOCh. 20.4 - Prob. 13BYGOCh. 20.4 - Prob. 14BYGOCh. 20.5 - Answer the following questions to test you...Ch. 20.5 - Answer the following questions to test you...Ch. 20.5 - Prob. 17BYGOCh. 20.5 - Answer the following questions to test you...Ch. 20 - Prob. 20.1.1AYLOCh. 20 - Prob. 20.1.2AYLOCh. 20 - Prob. 20.1.3AYLOCh. 20 - To test your knowledge, discuss the following...Ch. 20 - To test your knowledge, discuss the following...Ch. 20 - Prob. 20.1.6AYLOCh. 20 - Prob. 20.2.1AYLOCh. 20 - Prob. 20.2.2AYLOCh. 20 - Prob. 20.2.3AYLOCh. 20 - Reasons for the differences in muscularity between...Ch. 20 - Prob. 20.2.5AYLOCh. 20 - Prob. 20.2.6AYLOCh. 20 - The names, locations, and anatomy of the two...Ch. 20 - Prob. 20.2.8AYLOCh. 20 - Prob. 20.2.9AYLOCh. 20 - Prob. 20.2.10AYLOCh. 20 - Prob. 20.3.1AYLOCh. 20 - Prob. 20.3.2AYLOCh. 20 - Prob. 20.3.3AYLOCh. 20 - Prob. 20.3.4AYLOCh. 20 - Prob. 20.4.1AYLOCh. 20 - Prob. 20.4.2AYLOCh. 20 - Prob. 20.4.3AYLOCh. 20 - The Coronary Conduction System and Cardiac...Ch. 20 - Prob. 20.4.5AYLOCh. 20 - Prob. 20.5.1AYLOCh. 20 - Prob. 20.5.2AYLOCh. 20 - Prob. 20.5.3AYLOCh. 20 - Prob. 20.5.4AYLOCh. 20 - Prob. 20.5.5AYLOCh. 20 - Prob. 1TYRCh. 20 - To get from the right atrium to the right...Ch. 20 - There is/are_________ pulmonary vein(s) emptying...Ch. 20 - Prob. 4TYRCh. 20 - Prob. 5TYRCh. 20 - These are some of the points that the blood passes...Ch. 20 - The ascending aorta and pulmonary trunk develop...Ch. 20 - Prob. 8TYRCh. 20 - Blood in the anterior interventricular branch of...Ch. 20 - Which of these is not characteristic of the heart...Ch. 20 - Prob. 11TYRCh. 20 - The circulatory route from aorta to the venae...Ch. 20 - The circumflex branch of the left coronary artery...Ch. 20 - The finest passages through which electical...Ch. 20 - Electrical signal pass quickly from one...Ch. 20 - The abnormal bulging of the left AV valve into the...Ch. 20 - Prob. 17TYRCh. 20 - Prob. 18TYRCh. 20 - Prob. 19TYRCh. 20 - Prob. 20TYRCh. 20 - Prob. 1BYMVCh. 20 - Prob. 2BYMVCh. 20 - Prob. 3BYMVCh. 20 - Prob. 4BYMVCh. 20 - Prob. 5BYMVCh. 20 - Prob. 6BYMVCh. 20 - Prob. 7BYMVCh. 20 - Prob. 8BYMVCh. 20 - Prob. 9BYMVCh. 20 - Prob. 10BYMVCh. 20 - Prob. 1WWWTSCh. 20 - Prob. 2WWWTSCh. 20 - Prob. 3WWWTSCh. 20 - Briefly explain why each of the following...Ch. 20 - Briefly explain why each of the following...Ch. 20 - Prob. 6WWWTSCh. 20 - Briefly explain why each of the following...Ch. 20 - Prob. 8WWWTSCh. 20 - Prob. 9WWWTSCh. 20 - Prob. 10WWWTSCh. 20 - Prob. 1TYCCh. 20 - Becky, age 2, was born with a hole in her...Ch. 20 - Prob. 3TYCCh. 20 - Prob. 4TYCCh. 20 - Prob. 5TYC
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- Which heart chamber has the thickest wall? a. right atrium c. left atrium b. right ventricle d. left ventriclearrow_forwardDetermine whether the statement is either true or false. To clearly hear the heart sound of the bicuspid valve, a stethoscope should be placed to the left of the sternum at the second intercostal space. At late diastole, the atria and ventricles are relaxed and the aortic semilunar valve is open. During ventricular contraction all the blood is forced out of the ventricles.arrow_forwardWhat is the tissue type for the following structures of the heart Fibrous pericardium Serous pericardium Myocardium Endocardium Right atrium right Ventricle Left Atrium Left Ventricle Auricles Papillary muscles Fossa Ovalis Pectinate Muscles Chordae Tendinae Interventricular septum Tricuspid, pulmonary, Bicuspid, mitral, and Aortic semilunar valves pulmonary trunk Pulmonary artery Aorta Arteries Sinus/veinsarrow_forward
- left coronary artery great cardiac vein right coronary artery circumflex branch coronary sinus middle cardiac vein 5% of systemic circulation is blood flowing through the coronary circulation. The branches into the anterior interventricular branch (which supplies both ventricles and the anterior 2/3 of the interventricular septum), and the ,which supplies the left atrium and posterior wall of the left ventricle. The supplies the right atrium and sinoatrial node. Blood is returned to the right atrium through a series of cardiac veins. The collects blood from the anterior portion of the heart and empties into the coronary sinus. The collects blood from the posterior portion of the heart and drains into thearrow_forwardChordae tendineae: Group of answer choices hold the AV valves in place. contract when the heart contracts. are one part of the conductance system of the heart. regulate blood flow into the ventricles. are stretched during ventricular systole.arrow_forwardWhich structure is responsible for sending the electrical excitation from the atria towards the ventricles. Left bundle branch Sinoatrial node Right bundle branch Atrioventricular node Purkinje fibersarrow_forward
- Each heart chamber contracts separately, first the right atrium, then theright ventricle, left atrium, and left ventricle. True or Falsearrow_forwardA young couple that you are friends with gave birth to a new baby. They were told by their physician that the foramen ovale did not close between the right atrium and left atrium (i.e., that their baby has “a hole in her heart”). They know that you are a nurse and have come to you to help them to understand what is going on. Explain both the normal flow of blood through the heart and the flow with the foramen ovale still open. Include in your description the concept of oxygenated and deoxygenated blood.arrow_forwardvisceral pericardium endocardium myocardium parietal pericardium pericardial cavity The heart is covered by a pericardial sac. The outer layer of the sac is fibrous connective tissue layer called the The is a serous connective tissue layer that's directly adhered to the heart's surface. Between these two layers is the , which is filled with pericardial fluid and serves to cushion the heart. The is the thick muscular layer of the heart that makes-up the bulk of the chamber walls. It is thicker in heart chambers that pump blood farther distances, such as the left ventricle, and thinner in the atria that do not pump blood very long distances. The innermost heart layer is the , which has a slippery surface to prevent blood from sticking to the heart chamber walls.arrow_forward
- Which of the following conditions can cause irregularities in the sound of the heart? Mild atherosclerosis of the coronary arteries. Myocardial infarction Mild mitral valve regurgitation. Moderate bradycardia.arrow_forwardAtrial fibrillation (AF) is a rapid and unorganized beating of the upper chambers of the heart. It is generally not life-threatening in the short term, but it dramatically impacts how a patient feels, and it can have bad consequences in the long term. One of those “bad consequences” is stroke, caused by blood clots that can form in the atria when they are “fibrillating” for long periods of time, and the clots subsequently flow to the brain. We are now planning a study to see whether a new therapy (perhaps cryoablation plus a new drug) is better than a control therapy (perhaps cryotherapy plus an old drug) at preventing stroke or death. Our primary endpoint will be a composite of stroke or all-cause mortality, and we will structure this as a time-to-event analysis. We think the new therapy will lead to a reduction in risk of 40% (that is, a hazard ratio of 0.60). How many events must we observe (combined across both therapy groups) in order to have 95% power to detect a reduction…arrow_forwardThe coronary sinus can be found on the posterior aspect of the of the heart. O right atrium right ventricle left ventricle O left atriumarrow_forward
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