CH 19

The posterior interventricular vein is also called which of the following?

• Mitral vein

• Marginal vein

• Middle cardiac vein

Middle cardiac vein

• Sodium

• Potassium

• Slow calcium

If the volume of blood pumped by the left side of the heart was less than that pumped by the right side of the heart, what would be the result?

• Systemic edema

• Pulmonary edema

The second heart sound is associated with the closing of which valves?

• Semilunar valves

• Atrioventricular valves

What is the average cardiac output of a person at rest?

• 5,250 mL per minute

• 3, 500 mL per minute

• 1,500 mL per minute

Contractility of the heart refers to which of the following?

• How easily the myocardium expands

• The tension created by the recoil of the heart myocardium

• How hard the myocardium contracts for a given preload

Which force impedes the opening of the semilunar valves and opposes ventricular ejection?

• Afterload

• Preload

• Contractility

Depolarization in cardiocytes is prolonged probably because which channels are slow to close?

• Potassium

• Calcium

• Sodium

Which describes parasympathetic stimulation of the heart?

• Adrenergic

• Holocrine

• Cholinergic

What is the volume of blood ejected by each ventricle in one minute?

• Cardiac output

• Stroke volume

• Venous return