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