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Physiology > Cardiovascular Physiology > Flashcards

Cardiovascular Physiology Flashcards

0
Q

A 1

A

Smooth muscle contracion

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1
Q

Control conduits for blood flow

A

Arterioles

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2
Q

B2

A

Smooth muscle relaxation

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3
Q

Veins contain what receptors

A

A1

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4
Q

What is Ohm’s law

A

Q(flow)= ^P/R

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5
Q

Associated with high reynold’s number

A

Turbulent flow

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6
Q

Turbulent flow is seen in

A

Anemia

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7
Q

Stroke volume/ arterial compliance

A

Pulse pressure

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8
Q

Pressure in the capillaries

A

17mmHg

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9
Q

Pressure in the vena cava

A

0mmHg

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10
Q

Pressure in the pulmonary arteries

A

25mmHg

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11
Q

Pressure in the capillaries

A

7mmHg

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12
Q

Atrial depolarizatiob

A

P wave

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13
Q

Av node conduction

A

PR sement

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14
Q

Conduction time/ velocity through the av node

A

PR interval

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15
Q

Ventricular depolarization

A

QRS

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16
Q

Ventricular repolarization

A

T wave

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17
Q

Period of depolarization+ repolarization of ventricles

A

QT interval

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18
Q

Plateau of ventricular action potential

A

ST segment

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19
Q

Ventricular action potential: Na influx

A

0

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20
Q

Ventricular action potential: K efflux

A

1

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21
Q

Ventricular action potential: Ca influx

A

2

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22
Q

Ventricular action potential: K efflux

A

3

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23
Q

Ventricular action potential: RMP

A

4

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24
Q

SA node action potential: slow Na influx towards threshold

A

4

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25
Q

SA node action potential: Ca influx

A

0

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26
Q

SA node action potential: K efflux

A

3

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27
Q

Basis for v fib

A

Circus movements

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28
Q

Changes in the rate of relaxation

A

Lusitrophic

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29
Q

Changes in conduction velocity

A

Dromotrophic

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30
Q

Stressed volume

A

Arteries

31
Q

Low P waves, tall T waves

A

Hyperkalemia

32
Q

Flat inverted t waves, with u waves

A

Hypokalemia

33
Q

Prolonged qt interval

A

Hypocalcemia

34
Q

Shortened QT interval

A

Hypercalcemia

35
Q

AV block that causes fainting in patients due to initially supressed state of Purkinje fibers

A

Stokes Adam syndrome

36
Q

Produces changes jn rate of relaxation

A

Lusitrophic

37
Q

Produces changes in conduction velocity

A

Dromotrophic

38
Q

Affected by inotropes

A

Stroke volume

39
Q

Chronotropes affect

A

SA node

40
Q

Dromotropes affect

A

AV node

41
Q

Phase of cardiac cycle: distal third of diastole

A

Atrial contraction

42
Q

A wave is seen

A

Atrial contraction

43
Q

4th heart sound

A

Atrial contraction

44
Q

Preceeded by p wave

A

Atrialn contraction

45
Q

Phase of cardiac cycle: preceeded by QRS complex

A

Isovolumic contraction

46
Q

Phase of cardiac cycle: c wave

A

Isovolumic contractiont

47
Q

First heart sounds

A

Isovolumic contraction

48
Q

Phase of cardiac cycle: atrial filling begins

A

Rapid ventricular ejection

49
Q

Phase of cardiac cycle: t wave

A

Reduced ventricular ejection

50
Q

Phase of cardiac cycle: incisura

A

Isovolumic relaxation

51
Q

Phase of cardiac cycle: v wave

A

Isovolumic relaxatiob

52
Q

Phase of cardiac cycle: second heart sound is heard

A

Isovolumic relaxation

53
Q

3rd heart sound is heard

A

Rapid ventricular filling

54
Q

Longest phase of cardiac cycle

A

Reduced ventricular filling

55
Q

Slight increase in aortic pressure during isovolumic relaxation

A

Incisura

56
Q

Center responsible for regulation of HR and BP

A

Vasomotor area of medulla; lateral - excitatory; medial-inhibitory

57
Q

Parasympathetic stimulation of the heart causes

A

Dec contractility in the atria ONLY; dec HR and conduction velocity

58
Q

Where are baroreceptors found

A

Carotid sinus and aortic arch

59
Q

Respond to increase/ derease in pressures from 50-180 mmHg

A

Carotid baroreceptors

60
Q

Respond to increase in pressures >80 mmHg

A

Aortic baroreceptors

61
Q

Caratois sinus baroreceptors are mediated by what CN?

A

IX

62
Q

Aortic arch baroreceptors are mediated by what CN?

A

x

63
Q

BP control mechanisms that respond to low O2, high CO2 concentration whenever BP is <80mmHg

A

Chemorecptord

64
Q

Increased HR; helps match VR with CO

A

Bainbridge reflex

65
Q

CNS ischemic response stars at BP of

A

<60mmHg

66
Q

All systemic arterioles vasoconstrict severely except for coronary vessels, cerebral vessels

A

CNS ischemic response

67
Q

Triad of HPN, bradycardia, irregular respirations

A

Cushing rxn or cushing reflex

68
Q

Describes fluid movement into or out of the capillary

A

Starling forced

69
Q

Normal net filtration (starling forces)

A

2mL/min

70
Q

Mehanisms for local blood flow control

A

Myogenic theory, metabolic theory

71
Q

Most potent vasoconstrictor

A

Vasopressin

72
Q

Implicated in migraine

A

Serotonin

73
Q

Released by damaged endothelium

A

Endothelin

74
Q

Counteracts TXA2

A

Prostaglandin

75
Q

Vasodilators in muscles

A

Lactate, adenosine

Physiology (22 decks)

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