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Cardiovascular System

Cardiac Cycle - Systole

AV Node

Regarding systole of the cardiac cycle, which of the following structures sits at the junction of the atria and ventricles?

AV Node Conducts Signal to Bundle of His

Regarding systole of the cardiac cycle, which of the following occurs immediately after electrical conduction reaches the AV node?

Bundle of His Signals Purkinje Fibers to Contract Ventricles

Regarding systole of the cardiac cycle, which of the following actions most likely occurs immediately after the conduction signal reaches the bundle of His?

Tricuspid Valve Closes

Regarding systole of the cardiac cycle, which of the following actions most likely prevents backflow of blood into the right atrium?

Pulmonary Valve Opens

Regarding systole of the cardiac cycle, which of the following most likely allows blood to enter the lungs?

Mitral Valve Closes

Regarding systole of the cardiac cycle, which of the following prevents backflow of blood into the left atrium?

Aortic Valve Opens

Regarding systole of the cardiac cycle, which of the following most likely allow blood to enter systemic circulation?

Characteristics

Cardiac Cycle - Diastole

Sinoatrial (SA) Node Fires

Which of the following events initiates myocardial contraction?

Atrial Contraction

Which of the following occurs during diastole directly after the SA node fires?

Tricuspid Valve Opens

Which of the following allows blood to travel from the right atrium to the right ventricle?

Mitral Valve Opens

Which of the following allows blood to travel from the left atrium to the left ventricle?

Ventricles Fill

Which of the following occurs during diastole after the tricuspid and mitral valve open?

Pulmonary Valve Closes

Which of the following events prevents backflow of blood into the right ventricle?

Aortic Valve Closes

Which of the following events prevents backflow of blood into the left ventricle?

Ventricles Relax

Which of the following events isovolumetrically decreases ventricular pressure?

Lymphatics

Recycles 10% of Interstitial Fluid

Which of the following most appropriately describes the lymphatic system?

Transport Large Lipids from Lacteals

Which of the following is most likely a function of the lymphatic system?

Unidirectional Valves

WBCs Monitor Lymph for Pathogens

Which of the following is the most appropriate description of the function of WBCs in the lymphatic system?

Lymph Nodes Filter Lymph

Which of the following is the most appropriate statement about lymph nodes?

Merge with Veins

Which of the following is the most appropriate statement about lymph ducts in lymphatic circulation?

Cardiovascular Basics

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