Exam 28: Structure and Function of the Cardiovascular and Lymphatic Systems

The _____ follows depolarization of the myocardium and represents a period during which no new cardiac potential can be propagated.

Depolarization of a cardiac muscle cell occurs as the result of a:

What is the correct sequence of events that occur after the baroreceptor reflex is stimulated?

Where are the receptors for neurotransmitters located in the heart?

The arteries in the peripheral vasculature have less ability to stretch and recoil than the arteries of the great vessels.

Match the description with the corresponding terms. -Frank-Starling law

If the sinoatrial (SA)node fails,at what rate can the atrioventricular (AV)node polarize?

MATCHING Match the intracardiac pressures with their description. -An early diastole peak caused by filling of the atrium from peripheral veins

Match the description with the corresponding terms. -Laplace's law

Where are the coronary ostia located?

Which statement about development of collateral arteries in the heart is false?

MATCHING Match the intracardiac pressures with their description. -Produced because of descent of the tricuspid valve ring and by ejection of blood from both ventricles

The aortic valve obstructs coronary blood flow by pushing against the openings of the coronary arteries during systole.

Which phase of the normal myocardial cell depolarization and repolarization correlates with diastole?

_____ nerves can shorten the conduction time of action potential through the atrioventricular (AV)node.

Which statement about the pericardium is false?

What is the ratio of coronary capillaries to cardiac muscle cells?

Veins are less compliant than arteries.

Occlusion of the left anterior descending artery during a myocardial infarction would interrupt blood supply to which part of the heart?

Metabolic or hormonal agents produce changes in the heart and circulatory system faster than autonomic neural transmission.