BIOL 1015 Blood Flow, Circuits, Cardiac Physiology

Vein that empties blood from the upper body into the upper right heart chamber

• Inferior Vena Cava

• Superior Vena Cava

• Pulmonary Veins

• Aortic veins

Arteries taking low oxygenated blood from the lower right heart chamber to the lungs

• Pulmonary arteries
• Radial artery
• Aorta
• Femoral artery

The blood enters on the left side of the heart through the ______________ and enters the left atrium. It then passes through the _____________to enter the left ventricle.*

• pulmonary artery, mitral valve

• pulmonary vein, tricuspid valve

• pulmonary artery, aortic valve

• pulmonary vein, bicuspid valve

Pulmonary veins take unoxygenated blood away from the heart

• True

• False

On the right side of the heart, blood flows from the right ventricle to the?

• Tricuspid valve to the pulmonary vein

• Pulmonic valve to the pulmonary artery

• Tricuspid valve to pulmonary artery

• Inferior vena cava to the aorta

What is going on in the heart during the R-wave or QRS complex?

• SA node triggers depolarization in the atria, leading to atrial contraction.

• AV node triggers depolarization in the ventricles leading to ventricular contraction.

• Delay caused by the SA node.

• Repolarization of the ventricles.

Last to receive electrical impulses resulting in ventricular systole:

• AV node

• Purkinje fibers

• SA node

• AV bundle/bundle of His

Place the following in the correct order:

1.atria contract

2.AV node

3.bundle of His/AV bundle

4.Purkinje fibers

5.SA node

6.ventricles contract

• 5, 1, 2, 3, 4, 6

• 2, 1, 5, 3, 4, 6

• 5, 6, 2, 3, 4, 1

• 2, 6, 5, 3, 4, 1

Influence from the __________ nervous system results in a decrease of the SA node firing rate.

• central

• sympathetic

• parasympathetic

The AV node is located at...

• A
• B
• C
• D