1) The outer protective sac around the heart is the: a) Endocardium b) Epicardium c) Pericardium d) Myocardium 2) The endocardium is the: a) Inner lining of heart b) Thick muscular layer c) Outer connective layer d) Valve between atria 3) The myocardium is responsible for: a) Conducting impulses b) Pumping blood c) Producing hormones d) Controlling pressure 4) Coronary arteries mainly supply: a) The brain b) The heart muscle c) The kidneys d) The lungs 5) The interventricular septum separates the: a) Atria b) Ventricles c) Atria from ventricles d) Pericardium from myocardium 6) Papillary muscles are connected to: a) SA node b) Chordae tendineae c) Purkinje fibers d) Aortic arch 7) The chambers that receive blood are the: a) Atria b) Ventricles c) Arteries d) Valves 8) The primary pacemaker of the heart is the: a) AV node b) SA node c) Bundle of His d) Purkinje fibers 9) Which structure carries the electrical impulse across the ventricles? a) AV node b) Purkinje fibers c) SA node d) Atrial fibers 10) The cardiac apex is formed by the: a) Right ventricle b) Left ventricle c) Right atrium d) Left atrium

Heart Structure, Layers & Function Quiz

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