Chapter 15: The Heart Flashcards Preview

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Flashcards in Chapter 15: The Heart Deck (50)
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30

The second heart sound (dupp) is caused by this

SL valve closing

31

Heart rate is monitored and regulated by this structure

Cardiovascular center of medulla

32

This nerve decreases heart rate

Vagus

33

The heart speeds up when we stand up quickly due to to receptors here that detect blood pressure changes

Carotid artery

34

Explain the contractions of the chambers in the cardiac cycle

Atria contract
Ventricle contract
All relax

35

Coronary arteries branch off from ______

Aorta

36

The action of ______ causes audible heart sounds

Valves

37

What causes heart murmurs

Improperly closing valves

38

The period of relaxation in the cardiac cycle

Diastole

39

A heart that is stretched just before contraction will contract stronger according to this law

Frank Starling

40

The contraction phase of the heart

Systole

41

The "good" chemicals that take cholesterol to the liver are

High density lipids

42

What causes the semilunar valves to close

Pressure drop

43

The volume of blood ejected from each ventricle with one contraction of the heart

70mL

44

The amount of blood ejected by each ventricle each minute

Cardiac output

45

The term describing heart chamber contraction is _____.

Systole

46

Name several chemicals which would act to slow heart rate

K+ , Na+

47

The term describing heart chamber relaxation is ________.

Diastole

48

Chest pain caused from ischemia

Angina pectoris

49

Inflammation of the heart covering

Pericarditis