Lab #5 Information Quiz

Question 1

What test is used to measure the electrical activity of the heart?

Answer 1

electrocardiogram

Question 2

What structures in heart muscle allows action potential from the heart’s conduction system to spread through the cardiac muscle fibers?

Answer 2

Intercalated discs

Question 3

During the cardiac cycle, which valves open when the ventricles contract?

Answer 3

pulmonary semilunar valves and aortic semilunar valves

Question 4

During a cardiac cycle, when the ventricles fill with blood, which valves close?

Answer 4

Atrioventricular valves (AV Valves)

Question 5

A pause in the electrical impulse transmission of the heart occurs at the

Answer 5

atrioventricular node(AV node)

Question 6

Electrical impulses of the heart are initiated at the

Answer 6

sinoatrial node (SA Node)

Question 7

The amount of blood pumped out of the heart in one cardiac cycle:

Answer 7

Stroke volume

Question 8

The difference between an individuals resting cardiac output and their maximum cardiac output is called:

Answer 8

cardiac reserve

Question 9

Ventricular relaxation and expansion is known as the:

Answer 9

diastole

Question 10

Blood leaves the heart to enter the systematic circulation through which structure?

Answer 10

Aorta

Question 11

Ventricular contraction and constriction is known as

Answer 11

systole

Question 12

The bundle of HIS divides into what structure?

Answer 12

Right and left BUNDLE BRANCHES.

Question 13

Which cells compose the myocardium?

Answer 13

Cardiomyocytes
(Heart muscle cells)

Question 14

Oxygenated blood from the lungs enters the heart at the:

Answer 14

Left atrium-pulmonary veins enter the heart through the left atrium.

Question 15

The amount of blood pumped by the heart in one minute is called:

Answer 15

cardiac output