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ANATOMY 2 > HEART PHYSIOLOGY > Flashcards

HEART PHYSIOLOGY Flashcards

1
Q

Why do we have Gap Junctions and intercalated Discs?

A

So the heart does seperate when beating.

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2
Q

Where are the two Cardiac Centers located?

A

Medulla Oblongata

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3
Q

When Ventricular Systole occur this means what?

A

That the AP has now traveled from the atria to the ventricles

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3
Q

When the AV valves are open, the SV valves are ————

A

closed

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3
Q

When talking about the Ventricular Systole, myocardium contracts to———–

A

increase pressure

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4
Q

When myocardium contracts to increase pressure this does what?

A

closes the AV valves

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5
Q

When does Ventricular Filling occur?

A

Mid to late diastole

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6
Q

What occurs in depolarization of sarcolemma?

A

Opens Na+ Channels

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7
Q

What is cardiac cycle?

A

It is every event that occurs with blood flow through the heart

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8
Q

What is AV Bundle/Bundle of His?

A

splits into right and left bundle branches

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9
Q

What is End Diastolic Volume?

A

the volume in the ventricle at the end of the filling cycle

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10
Q

What does the Sinoatrial Node do?

A

creates sinus rhythm in the heart

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11
Q

What is the Sinoatrial Node?

A

it is the pacemaker of the heart

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12
Q

What does the Purkinje Fibers do?

A

go into myocardium of ventricles

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13
Q

what does Systole means?

A

contracts

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14
Q

What does Diastole means?

A

relax

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15
Q

What cranial nerve can affect the hearts pace?

A

Vagus Nerve

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16
Q

What are the Cardiac Centers?

A

Cardioacceleratory Center and Cardioinhibitory Center

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17
Q

What are Autorhythmic cell functions?

A

not controlling the cells and must be in rhythm

18
Q

What action does depolarization do?

A

Both rhythmic and spontaneous

19
Q

The cardioinhibitory center does what?

A

inhibits the SA and AV node by the vagus nerve

20
Q

The AV node does what?

A

slows transmissions from sinoatrial node

21
Q

Sinoatrial node starts what?

A

Cardiac conduction system

22
Q

Purkinje Fibers are also known as ———-

A

Subendocardial conducting network

23
Q

is cardioacceleratory center sympathetic or parasympathetic?

A

sympathetic

24
Q

How many action potentials does the sinoatrial node conduct per minute?

A

90-95 AP/minute

25
Q

Cardioinhibitory center is sympathetic or parasympathetic?

A

parasympathetic

26
Q

AV node conducts how many action potentials per minute?

A

40-60 AP/minute

27
Q

What the only second intercostal space on the right?

A

Aorta

28
Q

what is the only second intercostal space on the left?

A

pulmonary

29
Q

Cardiac output means what?

A

volume of blood pumped by each ventricle in one minute

30
Q

Heart rate x stroke volume?

A

cardiac output calculate

31
Q

What does HR means?

A

number of beats per minute(60-100)

32
Q

What does SV means?

A

volume of blood pumped out by a ventricle with each beat

33
Q

What is preload?

A

degree of stretch of cardiac muscle cells before they contract

34
Q

What is contractility?

A

contractile strength at a given muscle length

35
Q

What does positive inotropic agent do?

A

increase contratility

36
Q

What does inotropic agents do?

A

decrease contractility

37
Q

What is After-load?

A

pressure that must be overcome for ventricles to eject blood

38
Q

what does positive Chronotropic do?

A

increase heart rate

39
Q

what does negative Chronotropic do?

A

decrease heart rate

40
Q

Where does the atrial(Bainbridge) reflex happens?

A

ventricles

41
Q

what does Bradycardia means?

A

a little slower (less than 60bpm)

42
Q

what does Tachycardia

A

faster (more than 100bpm)

43
Q

what does Angina Pectoris means?

A

severe chest pain

ANATOMY 2 (10 decks)

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