Conduction System of the Heart

Blood leaves the _______ through the valve and cannot return to the _______.

• left ventricle; left ventricle

• right atrium; right atrium

• left atrium; left atrium

• right ventricle; right ventricle

The heart rate is regulated by the Autonomic Nervous System. True or False: We have voluntary control over the beating of the heart.

• True

• False

Special tissue within the heart is responsible for conducting an _______ impulse.

• electrical

• chemical

• thermal

• mechanical

Where do the electrical impulses in the heart begin?

• Atrioventricular Node (AV Node)

• Sinoatrial Node (SA Node)

• Bundle of His

• Purkinje fibers

What is another name for the Sinoatrial Node (SA Node)?

• Pacemaker

• Atrioventricular Valve

• Mitral Node

• Bundle of His

From the SA Node, a wave of electricity travels through the atria, causing them to contract, or go into _______.

• systole

• diastole

• fibrillation

• asystole

The Atrioventricular (AV Node) is stimulated after the SA Node. True or False: The AV Node is stimulated before the SA Node.

• True

• False