Exam 11: Cardiovascular System: The Heart

What is the term for the portion of the cardiac cycle that lasts about 0.3 seconds in normal resting cycle?

The right ventricle makes up most of the apex of the heart.

The chamber of the heart that normally has the thickest myocardium is the

What is the term for the chamber of the heart with the thickest wall?

Baroreceptors and chemoreceptors send signals to the cardiac center in the pons which initiates sympathetic impulses to increase heart rate.

An operation that attempts to repair the fossa ovalis is performed

What is the term for the region of an ECG that represents ventricular depolarization?

The two heart chambers that contain oxygenated blood are the

Oxygenated blood enters the left atrium through the

Most cardiac veins drain into the

Impulses that initiate heart contraction are spontaneously generated in the

When ventricular pressure just exceeds atrial pressure,the

The cardiac center for regulating heart rate is located in the

Which of these layers is most internal?

The first heart sound is heard just after the QRS on an electrocardiogram.The heart sound is caused by

Heart sounds are caused by

What is the term for the vessel that branches to form the circumflex artery?

The base of the heart is more superior than the apex.

What is the term given to amount of blood in ventricle at beginning of contraction?

The greatest deflection from the baseline on an electrocardiogram is caused by the