Anatomy Lecture 16

1. Increases rate and force of contractions Sympathetic innervation 2. Decreases the heart rate Parasympathetic innervation

The cells of the ___________ act as the heart's pacemaker, which establishes the pace for cardiac activity. atrioventricular (AV) node atrioventricular (AV) bundle Purkinje cells sinoatrial (SA) node

The epicardium is another name for the visceral layer of the serous pericardium. myometrium. parietal layer of the serous pericardium. pericardium. myocardium.

Which circuit of the cardiovascular system is responsible for sending blood to the kidneys, stomach, and pelvic regions? Systemic circuit Innards circuit Pulmonary circuit Vagus circuit Vanguard circuit

Which of the cardiovascular system's circuits has deoxygenated blood in its arteries? Systemic circuit Pulmonary circuit Vanguard circuit Antithesis circuit Innards circuit

In the right atrium, the auricle and anterior wall exhibit obvious muscular ridges called papillary muscles. pectinate muscles. auricular muscles. interventricular muscles.

The left atrium and left ventricle are part of which circuit of the cardiovascular system? Cardio circuit Systemic circuit Pulmonary circuit Coronary circuit Schwann circuit

1. Between right ventricle and pulmonary trunk Tricuspid valve 2. Between left atrium and left ventricle Pulmonary semilunar valve 3. Between right atrium and right ventricle Bicuspid valve 4. Between left ventricle and ascending aorta Aortic semilunar valve

Match the chamber of the heart with the structure(s) from which it receives blood. 1. Right atrium Right atrium 2. Pulmonary veins Right ventricle 3. Coronary sinus Left atrium 4. Left atrium Left ventricle

Which heart chambers pump deoxygenated blood? Left ventricle and right ventricle Right atrium and right ventricle Left atrium and left ventricle Left atrium and right atrium Right atrium and left ventricle

The sequence of travel by an action potential through the heart is Purkinje fibers, atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches. atrioventricular node, sinoatrial node, atrioventricular bundle, bundle branches, Purkinje fibers. sinoatrial node, atrioventricular node, atrioventricular bundle, bundle branches, Purkinje fibers. atrioventricular bundle, atrioventricular node, sinoatrial node, bundle branches, Purkinje fibers. atrioventricular node, sinoatrial bundle, atrioventricular node, bundle branches, Purkinje fibers.

The external layer of the heart wall is the myocardium. parietal pericardium. endocardium. epicardium.

Place the locations of the heart's conducting system in order, beginning with the location where the heartbeat is initiated. Sinoatrial (SA) node Left and right bundles Atrioventricular (AV) bundle Purkinje cells Atrioventricular (AV) node

Which values are reasonable for a healthy, 80 kilogram resting adult? 7.25 liters of blood pumped per ventricle per minute; 76,000 beats per day 6.75 liters of blood pumped per ventricle per minute; 20,000 beats per day 5.25 liters of blood pumped per ventricle per minute; 108,000 beats per day 4.25 liters of blood pumped per ventricle per minute; 60,000 beats per day 5.75 liters of blood pumped per ventricle per minute; 144,000 beats per day

Which analogy fits the human heart? It is like a double pump, each working at its own rate determined by the needs of the body served. It is like a single pump whose various chambers all work together at once. It is like a double pump, each working side by side with the other. It is like a single pump. It is like four pumps working in alternating cycles.