The Heart Ch. 19 & Pericardium And Heart Ch 19.

25 July 2022
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question
Which statement concerning the pulmonary arteries is FALSE? The right ventricle pumps blood into the pulmonary arteries. The pulmonary arteries carry oxygenated blood back from the lungs to the heart. The pulmonary arteries are part of the pulmonary circuit. The pulmonary arteries carry poorly oxygenated blood.
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False: The pulmonary arteries carry oxygenated blood back from the lungs to the heart. The pulmonary veins carry oxygenated blood back to the heart from the lungs. Arteries bring blood AWAY the heart.
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The term that describes the relaxation of a heart chamber wall as it fills with blood is__________ .
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diastole
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Which of the following vessels does not carry oxygen-poor blood to the heart? the pulmonary vein the coronary sinus the inferior vena cava the superior vena cava
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the pulmonary vein
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Which vessel returns most of the venous blood from the heart to the right atrium? the coronary sinus the anterior cardiac vein the great cardiac vein the posterior interventricular vein
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the coronary sinus
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During ventricular systole, blood is forced from the ventricles into the aorta and pulmonary trunk. forced from the atria into the ventricles. not flowing into or out of the heart. flowing from the systemic and pulmonary circuits into both the atria and ventricles.
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forced from the ventricles into the aorta and pulmonary trunk.
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In common usage, the terms "systole" and "diastole" refer to __________, respectively. ventricular contraction and ventricular filling the effects of myocardial infarction and pulmonary hypertension ventricular fibrillation and atrial fibrillation ventricular filling and ventricular contraction
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ventricular contraction and ventricular filling
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Assume blood is flowing from the coronary sinus to the lung capillaries. Place the anatomical items in order of flow in the target boxes.
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Capillaries of Lungs >Coronary Sinus > Right Atrium > Tricuspid Valve > Right Ventricle > Pulmonary Semilunar Valve > Pulmonary Trunk > Pulmonary Arteries > Capillaries of Lungs
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Oxygen-Rich Blood Returning to the Heart
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Lungs > Lung Capillaries > Pulmonary Veins > Left Atrium > Mitral/Bicuspid Valve > Left Ventricle > Aortic/semilunar Valve > Aorta
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Select the correct partial path below. This path is part of the complete blood flow pathway. You should be able to trace flow starting in any location. View Available Hint(s) Select the correct partial path below. This path is part of the complete blood flow pathway. You should be able to trace flow starting in any location. Systemic veins returning to the left atrium and forward through the mitral valve. Aorta to smaller systemic arteries to systemic capillaries to systemic veins to right atrium through the tricuspid valve Pulmonary trunk to pulmonary arteries to pulmonary capillaries to pulmonary veins returning to the right atrium. Pulmonary artery into left atrium through mitral valve to left ventricle Previous Answers Correct All systemic veins return oxygen-poor venous flow to the right atrium, through the tricuspid to the right ventricle, and up and out the pulmonary semilunar valve to the pulmonary trunk and pulmonary arteries to the capillaries of the lungs. Returning oxygen-rich blood flowing through pulmonary veins enters the left atrium, passes through the mitral valve to the left ventricle, and out through the aortic semilunar valve into the aorta and on to systemic capillaries.
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Aorta to smaller systemic arteries to systemic capillaries to systemic veins to right atrium through the tricuspid valve
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Which of these conduction sequences through the heart is correct? Which of these conduction sequences through the heart is correct? SA node, AV bundle, AV node, Purkinje fibers, bundle branches SA node, AV node, AV bundle, Purkinje fibers, bundle branches AV node, Purkinje fibers, AV bundle, SA node, bundle branches AV bundle, AV node, SA node, Purkinje fibers, bundle branches SA node, AV node, AV bundle, bundle branches, Purkinje fibers
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SA node, AV node, AV bundle, bundle branches, Purkinje fibers
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The atrioventricular node is located in the right atrium, just inferior to the opening of the superior vena cava. inferior part of the interatrial septum. interventricular septum, near the heart base. walls of the ventricles, with the other Purkinje fibers.
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inferior part of the interatrial septum.
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Identify the vessel that returns most of the blood from the heart into the right atrium. coronary sinus great cardiac vein superior vena cava coronary sulcus
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coronary sinus The majority of veins that drain the heart empty into the coronary sinus.
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The right and left coronary arteries __________. branch from the aortic arch supply blood to the pericardial sac supply blood to the heart muscle itself drain into the right atrium drain into the coronary sinus
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supply blood to the heart muscle itself
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A specific coronary vessel that lies in the anterior interventricular sulcus is the middle cardiac vein. coronary sinus. anterior interventricular artery/Left anterior descending artery (LAD). circumflex artery.
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anterior interventricular artery/Left anterior descending artery (LAD). circumflex artery.
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Serous fluid in the pericardial cavity __________. is secreted by the heart itself increases friction between the beating heart and the outer wall of the pericardial sac is a remnant of embryonic development is a slippery fluid secreted by the fibrous pericardium is secreted by the epithelial cells of both layers of the serous pericardium
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is secreted by the epithelial cells of both layers of the serous pericardium
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The__________ layer of the serous pericardium is also known as the epicardium.
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visceral
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The semilunar valves prevent backflow of blood into the _____. ventricles vena cavae lungs atria
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ventricles Correct. The pulmonary valve prevents backflow into the right ventricle; the aortic valve prevents backflow into the left ventricle.
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Which vessel carries oxygenated blood? pulmonary trunk pulmonary vein superior vena cava pulmonary artery
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pulmonary vein
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Which structure anchors the chordae tendinae of the atrioventricular valves? papillary muscle trabeculae carnea interventricular septum pectinate muscle
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papillary muscle The papillary muscles are extensions from the ventricular wall that connect to the chordae tendinae. Upon ventricular contraction, the papillary muscles contract to prevent the atrioventricular valves from everting into the atria.
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Which layer of the heart wall is visceral pericardium? epicardium endothelium myocardium endocardium
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epicardium
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Which heart chamber has the thickest myocardium? the left atrium, because blood returned from the lungs has a high pressure the right atrium, because it receives a greater amount of blood from the systemic veins the right ventricle, because it pumps poorly oxygenated blood the left ventricle, because it pumps blood at a higher pressure
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the left ventricle, because it pumps blood at a higher pressure The thick ventricular wall enables the left ventricle to pump blood at a much higher pressure than the right ventricle.
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Irregular ridges of muscle called trabeculae carneae are located within the walls of the__________ .
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ventricle
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The auricles are earlike flaps on the surface of the atria. modifications of the pectinate muscles on the inner surface of the atria. earlike flaps on the surface of the ventricles. projections of the endothelium into the ventricles.
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earlike flaps on the surface of the atria.
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The fibrous skeleton of the heart functions in all of these ways EXCEPT in __________. lining the heart chambers, covering the heart valves, and forming the ridge of the crista terminalis causing direct spread of electrical impulses from the atria to the ventricles anchoring the valve cusps preventing overdilation of the valve openings acting as the point of insertion for bundles of cardiac muscle in the atria and ventricles
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causing direct spread of electrical impulses from the atria to the ventricles
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When the ventricles relax, intraventricular pressure falls and __________. blood is pushed against the AV valves, causing them to open blood is pushed against the AV valves, causing them to close both the AV valves and semilunar valves are closed blood is pushed against the semilunar valves, causing them to close blood is pushed against the semilunar valves, causing them to open
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blood is pushed against the semilunar valves, causing them to close
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What is the function of the chordae tendineae and papillary muscles of the bicuspid and tricuspid valves? forcing closure of the semilunar valves preventing reflux (regurgitation) of atrial blood into the ventricles preventing eversion of the valves into the atria preventing reflux (regurgitation) of ventricular blood into the pulmonary trunk preventing reflux (regurgitation) of ventricular blood into the aorta opening the semilunar valves
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preventing eversion of the valves into the atria
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Heart valve with two cusps. fossa ovalis pulmonary semilunar valve aortic semilunar valve mitral valve atrioventricular bundle
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mitral valve
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Semilunar valves are located between the great veins and the atria. only between the left ventricle and the aorta. between the ventricles and the great arteries. between the atria and the ventricles
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between the ventricles and the great arteries.