Exam 28: Heart

Match each term related to heart circulation with its corresponding location or description. -Valve that opens into the right ventricle

The SA node resides primarily in the right atrial wall.

The heart of the developing human embryo begins to beat regularly early in the fourth week after fertilization.

Premature contractions, or extra systoles, often occur with lack of sleep, too much caffeine or nicotine, alcoholism, or heart damage.

The mitral valve has fewer flaps than the right atrioventricular valve.

The period during which blood is pumped out of the atria and into the ventricles is called:

The internal layer of tissue in the heart is the:

In an ECG both the deflections themselves and the interval between deflections can provide information about the electrical conduction through the heart.

The P wave is named as such because it measures a positive deflection in the ECG.

The contraction phase of the cardiac cycle refers to diastole.

The skeleton of the heart is made of cartilage rather than bone.

During the normal cardiac cycle, there is never a time when both the atria and ventricles are relaxed.

The terms AV bundles and Purkinje fibers refer to the same structures.

Atrial systole causes blood to:

The internal layer of the tissue in the heart is the epicardium.

Angina pectoris and myocardial infarction are synonymous terms.

Match each term related to heart circulation with its corresponding location or description. -Heart chamber that pumps blood through the aortic semilunar valve

Which of the following is another name for the visceral layer of the pericardium?

The terms subendocardial fibers and Purkinje fibers refer to the same structures.

Tachycardia refers to a heart rate of more than 100 beats per minute.