Cardiac Cycle

Diastole refers to what action?

• Filling

• Pumping

During ventricular systole what is happening?

• the ventricles are relaxed and the atria contracted

• the ventricles and the atria are relaxed

• the ventricles and the atria are contracted

• the ventricles are contracted and the atria are relaxed

Deoxygenated blood is found on the left side of the heart. True or false?

• True

• False

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.

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

The emptying of the atria is controlled by the:

• SA node
• AV node
• Purkinje fibres
• Bundle of His

The pacemaker of the heart is also known as the....

• AV node
• SA node
• Purkinje fibres
• Bundle of His

What fibres allow the ventricles to contract?

• SA
• AV
• Purkinje
• Bundle of His

During the systole phase of the cardiac cycle, the ventricles....

• Contract
• Relax

Which letter/s of the ECG shows the ventricles contracting.....

• P
• QRS
• ST