Stack #207856
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| The heart is a cone-shaped muscular organ located within the _______ of the thorax. | Mediastinum
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| The hearts apex rests on what? | Diaphragm
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| The superior margin of the heart lies at the level of which rib? | second
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| Approximately two thirds of the heart mass is seen to the left of what? | Midsternal
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| The loosely fitting outer layer of the heart is called what? | Fibrous pericardium.
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| The middle layer of the heart wall is what? | Parietal pericardium
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| The inner layer of the heart wall is called what? | Visceral pericardium
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| The visceral pericardium is also called what? | Epicardium
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| The function of the fluid that fills the pericardial sac is to decrease what during heart activity? | Friction
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| What is the middle layer of the heart wall called? | Myocardium
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| The myocardium is composed of what? | Cardiac muscle
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| Connective tissue that ramify throughout the myocardium constuct the so-called _____ of the heart. | Bundles
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| The membrane that lines the heart and also forms the valve flaps is what? | endocardium
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| The heart has how many chambers? | Four
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| Wich of the two are the recieving chambers? | Atriums
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| Which two are the discharging chambers? | Ventricles
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| Teeh-shaped bundles of smooth muscle, found only in the auricles, are called what? | Pectinate muscles
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| Irregular ridges of the muscles in the ventricles are what? | Trabeculate muscles
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| What prevents backflow into the ventricles when the heart is relaxed? | ASV and PSV
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| What prevents backflow into the atria when the ventricles are contracting? | Tricuspid and Bicuspid
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| What is an AV valve with three flaps? | Tricuspid
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| What is an AV valve with two flaps? | Bicuspid
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| What is the pacemaker of the purkinje system? | SA node
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| What is the point in the purkinje system where the impulse is temporarily delayed? | AV node
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| What condition results from prolonged coronary blockage? | Myocardial infarction
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| What is an abnormal pacemaker? | Ectopic focus
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| What allows backflow of blood? | Incompetent valve
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| Because of cardiac decompenssation, circulation is inadequate to meet tissue needs is what? | Congestive heart failure
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| What is a slow heartbeat, that is, below 60 beats per minute? | Bradycardia
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| What is a condition in which the heart is uncoordinated and useless as a pump? | Fibrillation
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| What is a rapid heartrate, that is, over 100 beats per minute? | Tachycardia
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| Damage to the AV node, totally or partially releasing the ventricles from the control of the SA node. | Heart block
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| What is a chest pain, resulting from ischemia of the myocardium? | Angina pectoris
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| What is a result of initial failure of the left side of the heart? | Pulmonary congestion
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