Nursing 302 Cardiovascular System Questions With Complete Solutions

the heart pumps out ___ mL of blood/beat correct answer: 60 protective covering of hearts, 2 layers: parietal and visceral correct answer: pericardium outer layer correct answer: epicardium middle layer, striated muscle fibers, responsible for contractile pull correct answer: Myocardium inner most layer, line the four chambers and valves correct answer: Endocardium 4 heart chambers correct answer: R&L atrium R&L ventricle control flow of blood between atria and valve tricuspid and mitral correct answer: 2 atrioventricular (AV) valves control movement out of ventricles (pulmonic and aortic) correct answer: 2 semilunar valves right side of heart is _____ correct answer: pulmonary left side of heart is _______ correct answer: systemic relaxation and filling of atria and ventricles correct answer: diastole contraction and emptying of atria and ventricles correct answer: systole Originate from Aorta, Supply blood to heart during diastole -Diastolic BP must be >60 for adequate blood flow through these arteries correct answer: Coronary Arteries Which artery is known as the widow-maker? correct answer: Left anterior descending -Natural pacemaker of the heart -Keeps heart rate between 60-100 beats/minute correct answer