Heart: Physiology

Question 1

What is the blood flow “map” for deoxygenated blood?

Answer 1

Vena cava –> right atrium –> right ventricle –> pulmonary artery –> lungs

Question 2

What is the blood flow “map” for oxygenated blood?

Answer 2

Lungs –> pulmonary veins –> left atrium –> left ventricle
–> aorta

Question 3

Difference between artery and vein?

Answer 3

They move blood away form the heart whereas veins move blood toward the heart

Question 4

What is the intrinsic conduction system?

Answer 4

It sets the pace for heart contractions

Question 5

Path of the intrinsic conduction system?

Answer 5

SA Node –> AV Node –> AV Bundle –> Bundle branches –> Purkinje fibers

Question 6

What creates the noise of the first bump in your heart beat?

Answer 6

SA Node

Question 7

What creates the noise of the second bump in your heart beat?

Answer 7

AV Node

Question 8

What Node fills the ventricles?

Answer 8

AV Node

Question 9

The SA Node is also known as the?

Answer 9

Cardiac Pacemaker

Question 10

What Node contracts the atria?

Answer 10

SA Node

Question 11

What is Diastole?

Answer 11

relaxation of the heart, filling with blood

Question 12

What is Systole?

Answer 12

Contraction of heart

Question 13

Two major steps in diastole?

Answer 13

1.) Atrial Contraction
2.) AV valve closes

Question 14

Four major steps in systole?

Answer 14

1.) Isovolumetric contactions
2.) Ejection phase
3.) Semilunar valves close
4.) Isovolumetric relaxation

Question 15

What is cardiac output?

Answer 15

Amount of blood pumped by each ventricle in one minute

Question 16

Cardiac output formula

Answer 16

heart rate x stroke volume

Question 17

Stroke volume definition?

Answer 17

Volume of blood pumped out by a ventricle in a heartbeat

Question 18

Heart Beat definition?

Answer 18

number of times the heart beats per minute

Question 19

How can your heart beat be affected?

Answer 19

Stress, hormones, ions and physical factors