19.1-19.8
The function of the atrium is to collect blood. collect blood and pump blood to the ventricle. pump blood to the ventricle. pump blood to the lungs. pump blood into the systemic circuit.
collect blood and pump blood to the ventricle.
The first blood vessels to branch from the aorta are the ________ arteries. pulmonary circumflex subclavian coronary carotid
coronary
The earlike extension of the atrium is the atricle. auricle. coronary sulcus. coronary sinus. ventricle.
auricle
The bicuspid, or mitral, valve is located between the left atrium and left ventricle. between the right atrium and right ventricle. in the opening of the aorta. in the opening of the pulmonary trunk. where the venae cavae join the right atrium.
between the left atrium and left ventricle.
The term used to describe fluid collecting in the pericardial cavity that restricts the movement of the heart is known as mitral valve prolapse. cardiac tamponade. pleural effusion. pericarditis. cardiomyopathy.
cardiac tamponade
The cusps (leaflets) of atrioventricular valves attach directly to interatrial septa. trabeculae carneae. coronary sulci. papillary muscles. chordae tendineae.
chordae tendineae
The ________ lines the chambers of the heart, covers the heart valves, and is continuous with the endothelium. epicardium visceral pericardium myocardium endocardium parietal pericardium
endocardium
Which structure provides a rapid-conduction path that tenses the papillary muscles before the ventricular myocardium contracts, preventing "slamming" of the right AV cusps?
Moderator band
Which chamber receives blood from the superior and inferior vena cavae?
Right atrium
Which heart chamber receives blood from the pulmonary veins?
left atrium
The circumflex branch and the anterior interventricular artery are branches of the left coronary artery. aorta. interventricular artery. right coronary artery. coronary sinus.
left coronary artery
Which chamber pumps oxygenated blood out the aorta to the systemic circuit? left ventricle left atrium right atrium right ventricle
left ventricle
Which structure attaches the pulmonary trunk to the aortic arch? coronary sinus ligamentum arteriosum coronary sulcus posterior interventricular sulcus
ligamentum arteriosum
Cardiac muscle cells are: multinucleated, with a low demand for nutrients. almost totally dependent on anaerobic metabolism. mechanically, chemically, and electrically connected to one another. nonstriated in appearance.
mechanically, chemically, and electrically connected to one another.
Compared to the right ventricle, the left ventricle has all the following characteristics except that it pumps a greater volume. contracts harder. has a thicker wall. is round in cross section. produces about four to six times more pressure when it contracts.
pumps a greater volume
If a patient's tricuspid valve was leaking during systole, what would happen? regurgitation into the right atrium regurgitation into the aorta regurgitation into the left atrium regurgitation into the superior vena cava None of the answers is correct.
regurgitation into the right atrium
The wall(s) of the ________ rest(s) on the diaphragm.
right ventricle
Which heart chamber pumps unoxygenated blood out the pulmonary trunk?
right ventricle
The pulmonary semilunar valve prevents backward flow into the pulmonary veins. aorta. pulmonary trunk. right ventricle. left atrium.
right ventricle.
Muscular ridges on the inner surface of the ventricles are called trabeculae carneae. pectinate muscles. ligamentum arteriosum. fossa ovalis. None of the answers is correct.
trabeculae carneae
The heart is actually (one, two, or three) pumps?
two
An equivalent term for epicardium is visceral pericardium. endocardium. myocardium. parietal pericardium. None of the answers is correct.
visceral pericardium
Arteriosclerosis can lead to coronary artery disease. stroke. hypertension. All of the conditions can arise from arteriosclerosis. None of the conditions can arise from arteriosclerosis.
All
Intercalated discs serve to transfer ________ from cell to cell. action potentials the force of contraction ionic currents All of the answers are correct. None of the answers is correct.
All