HEART LAB: ELECTROCARDIOGRAPHY

Question 1

What is the average resting heart rate?

Answer 1

the average resting heart is 75 beats/ minute

Question 2

True or False: the heart produces electrochemical impulses

Answer 2

true; the heart produces electrochemical impulses

Question 3

What is the function of electrodes?

Answer 3

electrodes are responsible for measuring the bodies electrical activity

Question 4

What does the term “systole” refer to?

Answer 4

the term “systole” refers to the contractile period of the heart

Question 5

What does the term “diastole” refer to?

Answer 5

the term “diastole” refers the relaxed period of the heart

Question 6

What are the three elements of the cardiac cycle?

Answer 6

the two elements of the cardiac cycle are the spread of excitation/ conduction of impulses, contraction/ generation of pressure, and the valves control of flow

Question 7

Describe how the cardiac cycle spreads impulses.

Answer 7

the cardiac cycle spreads excitation/ conduction of impulses by using the conduction system

Question 8

How long is each cardiac cycle?

Answer 8

each cardiac cycle is ~0.8 seconds

Question 9

Describe which valves are open/ closed during complete diastole (relaxation).

Answer 9

during complete relaxation the atrioventricular valves are open but the semilunar valves are closed

Question 10

Does blood flow into the ventricles passively or actively in to the ventricle?

Answer 10

the majority of blood flows passively until the sinoatrial node fires and forces the atriums to contract