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Ana > Ch 21 Lec 2 - Heart > Flashcards

Ch 21 Lec 2 - Heart Flashcards

0
Q

two atrioventricular valves

A

bicuspid, tricuspid

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1
Q

we have two ventricles because humans have a blank

A

high metabolism

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2
Q

tricuspid valve is aka right blank valve

A

av

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3
Q

tricuspid valve on the blank

A

right

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4
Q

tricuspid valve opens when blank force is greater and closes when blank force is greater

A

atrial, ventricular

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5
Q

bicuspid valve is on the blank

A

left

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6
Q

these hold valves in place and attach to cusps on ventricle side

A

chordae tendonae

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7
Q

small bundles of muscles that attach to the chordae tendonae

A

papillary muscles

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8
Q

when valves close, papillary muscles blank

A

contract and tighten cords

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9
Q

scaffolding on interior walls of ventricles

A

trabeculae carneae

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10
Q

valves between ventricle and artery

A

semilunar

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11
Q

valve on the right at the entrance to the pulmonary trunk and opens when right blank contracts

A

pulmonary, ventricle

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12
Q

valve on the left at entrance to aorta and opens when left blank contracts

A

aortic, ventricle

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13
Q

right atrium receives blood from blank and blank plus the coronary sinus

A

superior and inferior vena cava

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14
Q

path of blood

A

right atrium, right av valve, right ventricle, pulmonary valve, pulmonary trunk, to lungs, left atrium, left av valve, left ventricle, aortic valve, aorta, to tissues

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15
Q

funnel leading from right ventricle to pulmonary trunk

A

conus arteriosus

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16
Q

receives blood from pulmonary veins

A

left atrium

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17
Q

supplies the heart tissues with blood and blockage can result in a heart tissue dying

A

coronary circulation

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18
Q

these branch directly off of the aorta as it emerges

A

coronary arteries

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19
Q

left coronary artery has these two branches

A

circumflex, anterior interventricular artery

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20
Q

right coronary artery has these two branches

A

posterior interventricular artery, marginal artery

21
Q

these drain the myocardium

A

cardiac veins

22
Q

three cardiac veins

A

great, middle, small

23
Q

this empties into the right atrium

A

coronary sinus

24
Q

contractile phase of heart where chamber empties

A

systole

25
Q

relaxation phase of heart and chambers fill

A

diastole

26
Q

lub is when the blank valves close

A

av

27
Q

dup is when the blank valves close

A

semilunar

28
Q

heart beat is enabled by these two things

A

nodal cells, conducting fibers

29
Q

specialized muscle cells that conduct action potentials in the heart

A

nodal cells

30
Q

distributes stimulus to myocardium in heart

A

conducting fibers

31
Q

action potentials move down the heart causing it to contract blank

A

unevenly

32
Q

blank contract before blank

A

atria, ventricles

33
Q

conduction in the heart is a blank step process

A

5

34
Q

the pacemaker of the heart that spontaneously depolarizes

A

sinoatrial node

35
Q

sa node is located at the blank of the right atrium

A

back wall

36
Q

where four chambers meet

A

atrioventricular node

37
Q

signal is transmitted through av node by

A

interventricular pathways

38
Q

this transmits down interventricular septum

A

av bundle

39
Q

these branch off the av bundle and moves further down the septum

A

bundle branches

40
Q

these reflect up external wall of ventricle and extend into papillary muscles

A

purkinje fibers

41
Q

three parts of ekg

A

p wave, qrs, t wave

42
Q

depolarization of atria in ekg

A

p wave

43
Q

depolarization of ventricle in ekg

A

qrs

44
Q

repolarization of ventricle in ekg

A

t wave

45
Q

cardiac output is blank liters per minute

A

5

46
Q

spontaneous contractions of heart

A

autorhymicity

47
Q

these chemicals increase rate and force of heart contraction

A

norepinephrine, epinephrine

48
Q

two parts of neural control in medulla

A

cardioacceleratory centers, cardioinhibitory centers

49
Q

these centers in medulla release norepinephrine and increase heart rate

A

cardioacceleratory center

50
Q

center in medulla that releases ach and decreases heart rate

A

cardioinhibitory center

Ana (40 decks)

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