BIO 117 HONDROS EXAM 3

BIO 117 HONDROS EXAM 3 The apex of the heart is located - 5th intercostal space Which layer of the heart allows it to act as a pump? - Myocardium What is the apex of the heart? - The tip of the heart, pointing down towards the left 5th intercostal space. Which layer of the heart wall contains the epicardium? - Pericardium What surrounds the heart? - Pericardium What is related to the mitral valve (tricuspid valve)? - Bicuspid valve Which of the following contains oxygenated blood? - Left Atrium, Pulmonary veins, Aorta Which of the following contains deoxygenated blood? - Superior Vena Cava, Right Atrium, Pulmonary Arteries What supplies oxygenated blood to the heart muscle? - Coronary Arteries Which layer of the heart contains actin, myosin, and troponin? - Myocardium Which valves are open during atrial systole? - Tricuspid Mitral What is true of blood leaving the tissues and traveling towards the right atrium? - Oxygen poor, carbon dioxide rich Valve that prevents backflow of blood into the left ventricle when the left ventricle is in diastole? - Aortic The aorta receives blood from what structure? - Left ventricle Which vessel carries blood from the pulmonary capillaries to the left atrium? - Pulmonary veins Which cavity of the heart first receives unoxygenated blood from the vena cava? - Right atrium What is the right semilunar valve separating the right ventricle and the pulmonary artery? - The pulmonic valve What is the function of the pulmonic valve? - To prevent blood flow from the pulmonary arteries to the right ventricle during ventricular diastole What do heart rate and stroke volume determine? - Cardiac output What is the left ventricle doing when the right ventricle is contracting? - Pumping blood into the great vessels Where does the cardiac action potential normally originate? - SA node What chamber is the pacemaker located in? - right atrium What is the function of the perkinje fibers? - To conduct electrical signals throughout the ventricles Where is BP the lowest? - Inferior vena cava What vessel carries unoxygenated blood from the