test 3 - CV system pt2 Flashcards

1
Q

the heart is located in which body cavity?

A

thoracic cavity in the mediastinum

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2
Q

the lungs sit in which body cavity?

A

thoracic cavity - each in their own pleural cavity

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3
Q

the heart is slightly rotated to the _____

A

left

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4
Q

the _____ makes up the right wall of the heart

A

right atrium

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5
Q

the _____ makes up the inferior border of the heart

A

right ventricle

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6
Q

the _____ makes up the left border of the heart

A

left ventricle

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7
Q

the ____ is tucked behind the heart due to the rotation of the heart

A

left atrium

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8
Q

what is the role of the fibrous layer of the pericardium?

A

support the heart in the mediastinum

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9
Q

what is the most outer layer of the pericardium?

A

fibrous pericardium

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10
Q

which layer of pericardium is found deep to the fibrous pericardium?

A

parietal layer of the serous pericardium

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11
Q

what is found between the parietal and visceral layers of the serous pericardium?

A

pericardial space/cavity

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12
Q

what is another term for visceral layer of serous pericardium?

A

epicardium

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13
Q

functional syncytium - def

A

contraction/depolarization of one myocyte will cause contraction of other cells throughout the myocardium

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14
Q

which layer of the heart wall is continuous with the great vessels?

A

endocardium

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15
Q

how do the inner linings of the atria differ from the ventricles?

A

atria - smooth

ventricles - rough

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16
Q

what type of muscle is cardiac muscle?

A

involuntary striated muscles

17
Q

intercalated discs - def

A

fibrous structure bonding cells together

18
Q

function of gap junction

A

get muscle cells of heart to function as one unit

19
Q

label superficial heart anatomy model

A

lab 6 page 3

20
Q

trabeculae carnae - def

A

rough surface of ventricular walls

21
Q

all valves in the heart are passive

true or false?

22
Q

which arteries supply the heart with blood?

A

coronary arteries

23
Q

label coronary blood vessels

A

lab 6 page 5 and 6

24
Q

which artery is the main blood supply for the heart in most people?

A

posterior interventricular which comes off the right coronary artery (some people, it branches to the left)

25
the superior and inferior vena cava, and the coronary sinus all get emptied where?
right atrium
26
the heart needs NS stimulation to contract true or false?
false
27
describe the conduction pathway of the heart
- SA node - pacemaker of the heart - depolarizes - causes contraction of atria - impulse goes through internal pathway to AV node - slows electrical impulse to make sure atria don't contract at the same time as ventricles - impulse reaches inter ventricular septum - purkinje fibers - ventricles contract
28
how does the sympathetic NS regulate HR (pathway)?
pathway: - sympathetic preganglionic fiber - sympathetic ganglia (cervical and superior thoracic ganglia T1-T4) - sympathetic postganglionic fiber - cardiac nerve
29
how does the parasympathetic NS regulate HR (pathway)?
- parasympathetic preganglionic fiber - synapses in cardiac plexus - parasympathetic postgaglionic fibers