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Biol 205 > Ch. 21 > Flashcards

Ch. 21 Flashcards

1
Q

two circuits of the heart

A

pulmonary
systemic

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2
Q

pulmonary circuit caries blood that is

A

oxygen poor blood

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3
Q

pulmonary circuit order

A

right ventricle poor o2
o2 rich blood in left atrium

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4
Q

systemic circuit order

A

o2 rich blood to left ventricle
o2 poor blood to the right atrium

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5
Q

systemic circuit specializes for

A

cells and tissues

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6
Q

heart is located in the

A

mediastinum

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7
Q

mediastinum is the space between two

A

plueral cavities

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8
Q

between parietal pericardium and visceral pericardium is

A

pericardial fluid

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9
Q

apex is the

A

tip of the heart

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10
Q

heart is slightly

A

left on the chest

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11
Q

superior cells of the heart is the

A

epicardium

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12
Q

below the epicardium is the

A

myocardium

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13
Q

myocardium has

A

striated muscle cells connected by interca;ated discs

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14
Q

innermost layer of heart is the

A

endocardium

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15
Q

heart volume is mitochondria

A

25-35%

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16
Q

intercalated discs include

A

gap junctions and desmosomes

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17
Q

how many chambers in heart

A

4

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18
Q

2 superior heart chambers

A

atria

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19
Q

2 inferior heart chambners

A

ventricles

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20
Q

chambers divided by

A

interatrial septum
interventricular septum

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21
Q

heart atria volume increased by

A

auricles

22
Q

fossa ovalis marks location of

A

fetal foramen ovale

23
Q

oxygen poor blood enters right atrium via

A

superior vena cava
inferior vena cava
coronary sinus

24
Q

oxygen rich blood enters LA via

A

4 pulmonary veins

25
Q

heart ventricles are

A

discharging chambers

26
Q

papillary muscles project into

A

ventricular cavity and attach to valve es via chordae tendineae

27
Q

rv pumps oxygen poor blood to pulmonary circuit via

A

pulmonary trunk
pulmonary arteries

28
Q

LV pump oxygen rich blood to the systemic circuit via

A

aorta

29
Q

tricuspid valve seperates

A

right atriujm from righ ventricle

30
Q

bicuspid valve seperates the

A

left a left v

31
Q

pulmonary semilunar valve is at the

A

base of the pulmonary trunk

32
Q

aortic semilunar valve is at the

A

base of the aorta

33
Q

pulmonary semilunar valve is for the

A

right side of the heart

34
Q

lub dub

A

close of pulmonary valve then
aortic valve

35
Q

steps of heart ciruclation

A

coming in through systemic into the
right atrium
go through tricuspid valve
left ventricle
pulmonary semilunar valve
pulmonary trunk
pulmonary arteries
lungs
return through
pulmonary veins
left atrium
through bicuspid valve
left ventricle
into aorta
through aortic semilunar valve
into aorta
to a body

36
Q

coronary circulation supplies blood to the

A

muscle tissue of the heart

37
Q

cardio muscle is

A

autorhythmic

38
Q

electrical signals of the heart pumping start in the

A

sinoatrial node
sa

39
Q

SA node located

A

superior area of heart

40
Q

AV node doesn’t regularly send

A

messages by itself

41
Q

av node pacemaker goes through to the

A

av bundle

42
Q

purkinje fibers stimulate

A

walls of pulmanory trunk to contract

43
Q

heart rate is

A

intrinsic set by SA NODE

44
Q

sympathetic NS release

A

norepinephrine

45
Q

norepinephrine increases

A

HR and force of contraction

46
Q

parasympathetic NS releases

A

acetylcholine

47
Q

acetyclcholine decreases

A

heart rate

48
Q

myocardial infarction is a

A

heart attack

49
Q

cardiac arrhythmias means

A

irregular hb

50
Q

septal defect common for downsyndrome

A

atrioventricular

Biol 205 (45 decks)

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