Heart

Question 1

Double-walled sac that encloses the heart

Answer 1

Pericardium

Question 2

Deep to the pericardium

Answer 2

Serous Pericardium

Question 3

Lines the inside of the pericardiym

Answer 3

Parietal pericardium

Question 4

Covers the surface of the heart

Answer 4

Epicardium

Question 5

Composed mainly of cardiac muscle and forms the bulk of the heart

Answer 5

Myocardium

Question 6

Lines the chambers of the heart

Answer 6

Endocardium

Question 7

Receiving chambers of the heart

Answer 7

Right and let atria

Question 8

Pumps blood into the pulmonary trunk

Answer 8

Right ventricle

Question 9

Pumps blood into the aorta

Answer 9

Left ventricle

Question 10

Pumps blood into the pulmonary circuit

Answer 10

Right side of the heart

Question 11

Pumps blood into the systematic circuit

Answer 11

Left side of the heart

Question 12

Provides the blood supply for the heart cells

Answer 12

Coronary circulation

Question 13

Prevent backflow into the atria when the ventricles contract

Answer 13

Tricuspid and mitral valves

Question 14

AV Valves are open

Answer 14

heart is relaxes

Question 15

AV valves are closed

Answer 15

heart is contracting

Question 16

Prevent backflow of blood into the ventricles

Answer 16

Aortic and pulmonary valves

Question 17

Aortic and pulmonary valves are closed

Answer 17

Heart is relaxed

Question 18

Aortic and pulmonary valves are opened

Answer 18

Heart is contracting

Question 19

Made up of specialized cardiac cells that initiate and distribute impulses ensuring that the heart depolarizes in an orderly fashion

Answer 19

Intrinsic conduction system

Question 20

Unstable resting potential that continuously depolarizes

Answer 20

Autorhythmic cells

Question 21

Increases rate and depth of the heartbeat

Answer 21

Sympathetic center

Question 22

Slows heartbeat

Answer 22

Parasympathetic center

Question 23

Monitors and amplifies the electrical signals of the heart and records it as an electrocardiogram

Answer 23

Electrocardiograph

Question 24

The first heart sound

Answer 24

lub

Question 25

The second heart sound

Answer 25

Dup

Question 26

Extraneous heart sounds due to turbulent backflow of blood through a valve that does not close tightly

Answer 26

Heart murmurs

Question 27

Contractile phase of the cardiac cycle

Answer 27

Systole

Question 28

Relaxation stage of the cardiac cycle

Answer 28

Diastole

Question 29

The amount of blood pumped out a ventricle per beat

Answer 29

Cardiac output

Question 30

The frank-starling law of the heart states that the critical factor controlling stoke volume is the degree of stretch of cardiac mucle cells immediately before they contract

Answer 30

Preload

Question 31

Contractile strength increases if there is an increase in cytoplasmic calcium ion concentration

Answer 31

Contractility

Question 32

Ventriclar pressure that must be ovecome before blood can be ejected from the heart

Answer 32

Afterload

Question 33

When one side of the heart fails

Answer 33

Pulmonary congestion