Functions of the heart

Question 1

What is the function of the Cardiac cycle?

Answer 1

Systole (contraction) and diastole (relaxation) which lasts about 0.8 seconds

Question 2

What is the function of the electrical conduction system?

Answer 2

Sends electric impulses throughout the myocardium which is initiated by the Sinoatrial (SA) node

Question 3

What is the function of the Electrocardiogram? (ECG)?

Answer 3

Provides the graphical representation of the cardiac cycle

Question 4

In the Origin of heart sounds, what is Lub?

Answer 4

the first sound as the ventricles contract or the AV valves close

Question 5

In the Origin of heart sounds, what is Dub?

Answer 5

The second sounds which is heard when the semilunar valves close and the ventricles relax

Question 6

What is the average heart rate or bpm?

Answer 6

72 beats per minute (bpm)

Question 7

What is the pulse?

Answer 7

It is a rhythmic throbbing which results from the alternating expansion and contraction of the artery.

Question 8

What is blood pressure?

Answer 8

The force that was exerted by the blood on the walls of the vessel which is measured by the sphygmomanometer.