Exam 7: Cardiac Physiology

Which of the following ECG waves represents ventricular repolarization?

Match the EKG feature with the correct characteristic by using the answer code: -time during which ventricles are contracting and emptying

Why is the sinoatrial node the heart's normal pacemaker?

The ____________________ is the volume of blood in the ventricle when filling is complete.

Increased EDV results in decreased stroke volume.

Left-sided congestive heart failure can lead to pulmonary edema.

Indicate which pressure relationship exists during the time in question by using the answer code (options may be used more than once or not at all): -when the atrioventricular valve closes

Most ventricular filling is accomplished during atrial contraction.

Which cardiac valve prevents regurgitation of blood from a right ventricle to atrium?

Sympathetic stimulation increases the heart rate.

When does the aortic semilunar valve open?

Compare and contrast intrinsic and extrinsic controls of cardiac activity.

What is the proper sequence of blood flow through the circulatory system? 1)right atrium 6)pulmonary vein 2)left atrium 7)lungs 3)right ventricle 8)systemic tissues 4)left ventricle 9)aorta 5)pulmonary artery 10)venae cavae

MATCHING Match the term with the correct characteristic by using the answer code: -induces coronary vasodilation

Indicate which valve abnormality is being described by using the answer code (options may be used more than once or not at all): -produces a "gurgling" murmur

The end-diastolic volume is the maximum amount of blood in the ventricle after ventricular filling is complete.

The heart valves are innervated by the autonomic nervous system.

How does hypertension influence heart activity?

An increase in stroke volume ____________________ the cardiac output.

Indicate the effects of sympathetic and parasympathetic stimulation on the heart by using the answer code (options may be used more than once or not at all): -decreases the contractility of the ventricular muscle