Test 2 chapter 31 Flashcards Preview

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Flashcards in Test 2 chapter 31 Deck (66)
1

starts the heart beat
pace maker of the heart

SA node

2

what side of the heart pumps blood though the lungs

the right side

3

what side of the heart sends blood throughout the systemic circulation, which supplies all of the body except the lungs

the left side

4

flow of the electrical system

SA node, AV node, Bundle of His, right and left bundle branch, Purkinje fibers

5

used to lubricate and protect the heart

pericardium

6

where are the coronary arteries located

the myocardium

7

chambers of the heart make up what system

the pump system

8

which side of the heart is a low pressure system

right side

9

which side of the heart is a high pressure system

left side

10

what valves open during ventricular relaxation

mitral and tricuspid valves

11

valves on the right side of heart

tricuspid and pulmonary semilunar valve

12

valves on the left side of heart

mitral and aortic semilunar valve

13

allow for the rapid transmission of electrical impulses

intercalated disks

14

blood vessels that are made of muscle

arteries

15

blood vessels that have valves

veins

16

internal component of blood vessels

lumen

17

internal layer of blood vessels

tunica intima

18

outside of blood vessel

tunica externa

19

the right heart receives venous deoxygenated blood from the systemic circulation through what

the superior and inferior vena cava

20

transports unoxygenated blood from the right heart to the right and left lungs

pulmonary arteries

21

two from the left lung and two from the rich flung, carry oxygenated blood from the lungs to the left side of the heart

pulmonary veins

22

when blood fills the ventricles

diastole

23

when blood is propelled out of the the ventricles and into the pulmonary and systemic circulation

systole

24

phase where Ca slowly enter the cell
early repolarization

phase 1

25

phase where Ca and NA slowly enter cell
continued replarization

phase 2

26

phase where K moves out of cell

phase 3

27

return to resting membrane potential phase

phase 4

28

phase where Na rapidly enters cell
depolarization

phase 0

29

senses pressures in the different chambers

swan ganz catheter

30

what are the two major coronary arteries

right and left coronary artery

31

Feed the right side of heart, both atrium and ventricle
Feeds SA and AV nodes

right coronary artery

32

feeds left atrium
Splits into circumflex and left anterior descending artery

left main coronary artery

33

feeds around and back of heart

circumflex

34

feeds the anterior of heart and septum

left anterior descending artery

35

electrical activation

depolarization

36

electrical deactivation

Repolarization

37

the property of generating spontaneous depolarization to threshold, enables the SA and AV nodes to generate cardiac action potentials without andy stimulus

automaticity

38

is the regular generation of action potential by the hearts conduction system

rhythmicity

39

represents atrial depolarization

P wave

40

represents ventricular depolarization and atrial repolarization

QRS wave

41

represents ventricular repolarization

T wave

42

increase electrical conductivity and the straight of the myocardial contraction
Increase HR, BP and ejection fraction

sympathetic nerves

43

slows down conduction of action potentials though the heart, and reduces the strength of contraction
Only comes for vegus nerve

parasympathetic nerves

44

adrenergic receptors that cause vasoconstriction

alpha 1 and beta 1

45

adrenergic receptors that cause vasodilation

alpha 2 and beta 2

46

fill

preload

47

resistance pressure
how hard is has to beat to get out

afterload

48

how hard the heart is actually squeezing
Measured by ejection fraction

myocardial contractility

49

the stroke volume of the heart increases in response to an increase in the volume of blood filling the heart (the end of diastolic volume) when all other factors remain constant

frank-starling law

50

is the volume of blood flowing through either the systemic or the pulmonary circuit and is expressed in liters per minute

cardiac output

51

what makes up stroke volume

preload
afterload
contractility

52

make up preload

end systolic volume
venous return

53

make up after load

aortic pressure
aortic valvular function

54

make up contractility

end diastolic volume
sympathetic stimulation
myocardial oxygen supply

55

regulates Na excretion (natriuresis), diuresis, vasodilation

natriuretic peptide

56

increase NA excretion (via urination) and lowers BP

atrial natriuretic peptide

57

excreted from cardiac cells due to excessive stretching . works similarly to ANP

Brain natriuretic peptide

58

highly concentrated in endothelium, mediator of vasodilation

C-type natriuretic peptide

59

intrarenal regulation of sodium and water balance and sodium excretion

urodilantin

60

Hot spot imaging indicates

MI with active infarction

61

cold spot imaging indicates

MI with death

62

invasive test used for looking at electrical function

atrioventicular bundle electrocardiograph

63

invasive test used for looking at pump function

cardiac catheterization

64

invasive test used for looking at blood flow

coronary angiography

65

Hardening of the vessel wall
CAn come from fat or calcium

arteriosclerosis

66

Plaque within the arterial wall
Fatty build up

Atherosclerosis