Chapter 19 review

Front

Ventricular relaxation immediately follows ________.

Back

ventricular repolarization

Front

Which component of the heart conduction system would have the slowest rate of firing?

Back

atrioventricular node

Front

In which septum is it normal to find openings in the adult?

Back

all of the above (interatrial septum, interventricular septum, atrioventricular septum)

Front

The force the heart must overcome to pump blood is known as ________.

Back

afterload

Front

Most blood enters the ventricle during ________.

Back

atrial diastole

Front

What is the primary function of the atrioventricular node?

Back

To delay the electrical impulse from the atria to the ventricles, allowing for proper filling.

Front

Define preload in the context of cardiac function.

Back

The degree of stretch of the cardiac muscle fibers at the end of diastole.

Front

What is cardiac output?

Back

The volume of blood the heart pumps per minute, calculated as heart rate multiplied by stroke volume.

Front

Explain the term 'stroke volume'.

Back

The amount of blood ejected by the left ventricle during one contraction.

Front

What happens during atrial systole?

Back

The atria contract, pushing blood into the ventricles.