4-6. Heart Action and Cardiac Conduction

An electrocardiogram measures what?

• The amount of pressure exerted on blood vessels.
• The electrical activity of the heart.
• How many times the heart contracts over time.
• The body's temperature caused by friction of blood in vessel.

The 'Dub' sound of the heart's LUB DUB? are the....

• Cuspid valves closing

• Semilunar Valves closing

• Blood flowing through the Pulmonary Trunk and Aorta

• Blood Flowing down into the venticles

The 'Lub' sound of the heart's LUB DUB? are the....

• Cuspid valves closing

• Semilunar Valves closing

• Blood flowing through the Pulmonary Trunk and Aorta

• Blood Flowing down into the venticles

What is the definition of the Cardiac Cycle?

• the contraction of the atria
• the sequence of events that occur during one complete heartbeat
• the contraction and relaxation of the ventricles
• the circulation of blood in the heart

Which of the following describes the network that distributes electrical impulses throughout the heart?

• cardiac conduction system

• electrocardiogram

• HECO

• action potential network

The AV node is located between which two parts of the heart?

• right atria, left atria

• atria, ventricle

• left ventricle, left ventricle

• epicardium, pericardium

The last place electrical impulses move through the heart is located where?

• the AV Node

• the Purkinje fibers

• the SA Node

• the AV Bundle

The bundle of nerves that sets the pace of the heart.?

• AV Node

• Bundle of His

• Purkinje fibers

• SA Node

What is heart rate?

• Oxygen going to the heart

• The number of times your heart beats in a minute

• Blood pumping though the body

• Carbon dioxide leaving the body

Factors that can increase or decrease heart rate

• Temperature and time of day

• Exercise and temperature

• Exercise and how much food you have had

• None