Exam 7: Cardiac Physiology

Which heart chamber has the greatest workload?

The action potential impulse passes through the AV node between the P wave and QRS complex.

Describe the primary factors that influence cardiac output.

Vitamins ____________________ and ____________________ have been shown to slow plaque deposition.

Match heart characteristic with correct anatomical structure by using the answer code (options may be used more than once or not at all): -overcomes the afterload of the circuits

Blood returning from the lungs _________________

An increase in venous return ____________________ the stroke volume.

Atrial repolarization does not occur.

MATCHING Match the term with the correct characteristic by using the answer code: -carries cholesterol to cells

The first heart sound signals the onset of ventricular systole.

The atria and the ventricles contract at the same time to ensure efficient pumping action.

Match the EKG feature with the correct characteristic by using the answer code: -time during which impulse is travelling through the AV node

Atrial systole lasts throughout ventricular systole.

The T wave represents the depolarization of the ventricles.

What is the normal direction of the impulse through the conduction system of the heart for each cardiac cycle?

What is the normal sequence of the spread of cardiac excitation?

Indicate which ion is involved in each event being described by using the answer code (options may be used more than once or not at all): -The rapid falling phase of the cardiac action potential is brought about primarily by the outward diffusion of _____.

On an electrocardiogram,what represents depolarization of the ventricles?

A(n)____________________ is a clot attached to the wall of a vessel.

All of the blood within the ventricles is ejected during ventricular systole.