EKG Chapter 1-2 Test

The normal heart is the size of a

• foot.
• cherry.
• man's fist.
• watermelon.

The top of the heart where the great vessels emerge is the

• apex.
• base.
• chordae tendonae.
• tricuspid valve.

The apex of the heart is located at the

• top of the heart, where the great vessels emerge.
• right side of the heart.
• bottom of the heart, at the leftmost tip.
• back wall of the heart.

Pericardial fluid

• decreases friction of the pericardial layers as they rub against each other.
• prevents backflow of blood from one chamber to the other.
• circulates through the heart's chambers.
• lubricates the electrical system of the heart.

The layer of the heart that is damaged during a heart attack is the

• epicardium.
• pericardium.
• endocardium.
• myocardium.

Which of the following statements about the right atrium is TRUE?

• It is a receiving chamber for oxygenated blood returning from the lungs.
• It is the major pumping chamber of the heart.
• It is about 100% saturated with oxygen.
• It is the receiving chamber for deoxygenated blood coming from the vena cava.

Which heart chamber delivers oxygenated blood to the entire body?

• Right atrium
• Right ventricle
• Left atrium
• Left ventricle

Heart valves serve what purpose?

• They prevent blood from flowing forward.
• They prevent oxygenated blood from flowing through the coronary arteries.
• They prevent backflow of blood.
• They control the heart's electrical signals.

The valve that separates the right atrium and right ventricle is the

• mitral valve.
• pulmonic valve.
• aortic valve.
• tricuspid valve.

What causes heart sounds?

• Blood traveling through the heart
• Opening of the heart valves
• Closing of the heart valves
• Blood hitting an obstruction in the peripheral circulation