The Heart

Document Content and Description Below

Multiple-Choice Questions 1) Artery is to ________ as vein is to ________. A) efferent; afferent B) afferent; efferent C) toward; away D) afferent; away E) efferent; away Answer: ... A 2) The heart beats approximately ________ times each day. A) 1,000 B) 10,000 C) 100,000 D) 1,000,000 E) 10,000,000 Answer: C 3) The heart pumps approximately ________ liters of blood each day. A) 8,000 B) 15,000 C) 20,000 D) 50,000 E) 100,000 Answer: A 4) Excess fluid in the ________ causes cardiac tamponade. A) pericardial cavity B) visceral pericardium C) apex of heart D) left ventricle E) both atria Answer: A 5) Tetanic muscle contractions don't occur in a normal cardiac muscle because A) cardiac muscle tissue contracts on its own. B) neural stimulation is lacking. C) the refractory period lasts until the muscle relaxes. D) the refractory period ends before the muscle reaches peak tension. E) potassium channels outnumber sodium channels. Answer: C 6) The adult heart is roughly the size of A) the liver. B) a man's clenched fist. C) the gallbladder. D) the hand of a 10-year-old. E) the brain. Answer: B 7) Which of the following descriptions matches the term near the left fifth intercostal space? A) pericardial cavity B) visceral pericardium C) apex of heart D) aorta E) right atrium Answer: C 8) The term used to describe fluid collecting in the pericardial cavity that restricts the movement of the heart is known as A) cardiac tamponade. B) mitral valve prolapse. C) pleural effusion. D) cardiomyopathy. E) pericarditis. Answer: A 9) The interventricular sulci and coronary sulcus A) contain fat. B) contain arteries. C) contain veins. D) are grooves on the surface of the heart. E) All of the answers are correct. Answer: E 10) The structure that permits blood flow from the right atrium to the left atrium in the fetal circulation is the A) foramen ovale. B) interatrial septum. C) coronary sinus. D) fossa ovalis. E) ligamentum arteriosus. Answer: A 11) Blood leaves the right ventricle by passing through the A) aortic valve. B) pulmonary valve. C) mitral valve. D) tricuspid valve. E) bicuspid valve. Answer: B 12) Intercalated discs serve to transfer ________ from cell to cell. A) ionic currents B) action potentials C) the force of contraction D) electrical signals E) All of the answers are correct. Answer: E 13) Cardiac muscle cells and skeletal muscle cells differ in a few ways. Which of the following is not one of them? A) Cardiac muscle cells are smaller in size. B) Cardiac muscle cells have a single, centered nucleus. C) Cardiac muscle cells branch. D) Skeletal muscle cells lack intercalated discs. E) Cardiac muscle cells lack transverse tubules. Answer: E 14) The atrioventricular valves permit blood flow A) in one direction only. B) in both directions. C) in many directions. D) in opposite directions on the right and left. E) from a ventricle to an atrium. Answer: A 15) Blood returning to the heart from the systemic circuit first enters the A) right atrium. B) right ventricle. C) left atrium. D) left ventricle. E) conus arteriosus. Answer: A 16) Blood returning to the heart from the pulmonary circuit first enters the A) right atrium. B) right ventricle. C) left atrium. D) left ventricle. E) conus arteriosus. Answer: C 17) The earlike extension of the atrium is the A) ventricle. B) coronary sinus. C) coronary sulcus. D) auricle. E) atricle. Answer: D 18) The coronary sulcus is a groove that A) marks the border between the atria and ventricles. B) marks the boundary line between the right and left ventricles. C) marks the boundary line between the right and left atria. D) separates the atrioventricular valves from the atria. E) separates the coronary arteries from the coronary veins. Answer: A 19) In the middle of the thoracic cavity is a region occupied by the heart, great vessels, thymus, esophagus, and trachea called the A) pleural space. B) pericardial space. C) mediastinum. D) cardiac notch. E) ventral cavity. Answer: C 20) The cusps (leaflets) of atrioventricular valves attach directly to A) papillary muscles. B) trabeculae carneae. C) chordae tendineae. D) interatrial septa. E) coronary sulci. Answer: C 21) Contractions of the papillary muscles A) close the atrioventricular valves. B) close the semilunar valves. C) eject blood from the ventricles. D) prevent the atrioventricular valves from reversing into the atria. E) eject blood from the atria into the ventricles. Answer: D 22) The visceral pericardium is the same as the A) mediastinum. B) parietal pericardium. C) epicardium. D) myocardium. E) endocardium. Answer: C 23) Most of the middle layer in the heart wall is composed of A) cardiac muscle cells. B) chondrocytes. C) epitheliocytes. D) fibrocytes. E) smooth muscle cells. Answer: A 24) The right ventricle pumps blood to the A) right and left lungs. B) left ventricle. C) left atrium. D) aorta. E) right atrium. Answer: A 25) The left ventricle pumps blood to the A) lungs. B) right ventricle. C) right atrium. D) aorta. E) pulmonary circuit. Answer: D 26) The right atrium receives blood from the A) coronary sinus. B) superior vena cava. C) inferior vena cava. D) systemic circuit. E) All of the answers are correct. Answer: D 27) In order to perform a CABG, a cardiac surgeon must A) open the pericardial sac. B) open the myocardium to see the AV valves. C) visualize the pulmonary valve. D) visualize the carotid arteries. E) All of the answers are correct. Answer: A 28) When a blood clot forms on a ruptured plaque in a coronary artery, the condition is referred to as a(n) A) coronary spasm. B) myocardial infarction. C) coronary thrombosis. D) angina pectoris. E) pulmonary embolism. Answer: C 29) When the left ventricle contracts, the distance from the apex to the base A) increases. B) decreases. C) remains unchanged. Answer: B Learning Outcome: 20-1 Bloom's Taxonomy: Comprehension 30) When the left ventricle contracts, the diameter of the ventricular chamber A) increases. B) decreases. C) remains the same. Answer: B 31) Cardiac cells damaged by infarction will show which of the following? A) switch to anaerobic metabolism B) release of enzymes into the circulation C) release of troponin T and I into the circulation D) release of CK-MB into the circulation E) All of the answers are correct. Answer: E 32) Blood flowing into the heart from the venae cavae flows next through the ________ valve. A) mitral B) bicuspid C) tricuspid D) pulmonary semilunar E) aortic semilunar Answer: C 33) As blood leaves the right ventricle it passes through the ________ and then into the pulmonary trunk. A) pulmonary veins B) conus arteriosus C) aorta D) inferior vena cava E) superior vena cava Answer: B 34) Coronary veins empty into the A) left atrium. B) left ventricle. C) right atrium. D) right ventricle. E) conus arteriosus. Answer: C 35) There are ________ pulmonary veins. A) 2 B) 4 C) 6 D) 8 E) 12 Answer: B 36) Rupture of the papillary muscles in the left ventricle may result in A) mitral regurgitation. B) mitral valve prolapse. C) bicuspid regurgitation. D) bicuspid prolapse. E) All of the answers are correct. Answer: E 37) When the semilunar valves close, the AV valves then A) close. B) open. C) make the third heart sound. D) contract. E) prolapse. Answer: B 38) The ________ deliver(s) blood to the myocardium. A) coronary arteries B) cardiac veins C) superior vena cava D) carotid arteries E) coronary sinus Answer: A 39) The connective tissue fibers of the myocardium A) add strength and prevent overexpansion of the heart. B) help distribute the forces of contraction. C) provide elasticity to help return the heart to its normal size. D) provide physical support for cardiac muscle. E) All of the answers are correct. Answer: E 40) Blood is supplied to the left atrium by the A) brachiocephalic artery. B) right coronary artery. C) left coronary artery. D) phrenic arteries. E) pulmonary arteries. Answer: C 41) The pulmonary semilunar valve prevents backward flow into the A) aorta. B) pulmonary trunk. C) pulmonary veins. D) right ventricle. E) left atrium. Answer: D 42) The bicuspid or mitral valve is located A) in the opening of the aorta. B) in the opening of the pulmonary trunk. C) where the venae cavae join the right atrium. D) between the right atrium and right ventricle. E) between the left atrium and left ventricle. Answer: E 43) The ________ valve prevents backward flow into the left atrium. A) semicaval B) semilunar C) bicuspid D) tricuspid E) pulmonic Answer: C 44) The function of an atrium is to A) collect blood. B) pump blood to the lungs. C) pump blood into the systemic circuit. D) pump blood to the ventricle. E) collect blood then pump it to the ventricle. Answer: E 45) Compared to the right ventricle, the left ventricle has all the following characteristics, except that it A) has a thicker wall. B) is round in cross section. C) pumps a greater volume. D) works harder. E) produces about four to six times more pressure when it contracts. Answer: C 46) Which of the following are involved in the pulmonary circuit? A) superior vena cava, right atrium, left ventricle B) right ventricle, pulmonary veins, aorta C) right ventricle, pulmonary trunk, left atrium D) inferior vena cava, right atrium, aorta E) left ventricle, pulmonary veins, right atrium Answer: C 47) The right pulmonary veins carry ________ blood to the ________ . A) deoxygenated; left atrium B) oxygenated; right lung C) deoxygenated; superior vena cava D) deoxygenated; right atrium E) oxygenated; left atrium Answer: E 48) The following is a list of vessels and structures that are associated with the heart. 1. right atrium 2. left atrium 3. right ventricle 4. left ventricle 5. venae cavae 6. aorta 7. pulmonary trunk 8. pulmonary veins What is the correct order for the flow of blood entering from the systemic circulation? A) 1, 2, 7, 8, 3, 4, 6, 5 B) 1, 7, 3, 8, 2, 4, 6, 5 C) 5, 1, 3, 7, 8, 2, 4, 6 D) 5, 3, 1, 7, 8, 4, 2, 6 E) 5, 1, 3, 8, 7, 2, 4, 6 Answer: C [Show More]

Last updated: 3 years ago

Preview 1 out of 7 pages