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A&P 224 > Lab Quiz #3 > Flashcards

Lab Quiz #3 Flashcards

1
Q

what is a plethysmograph?

A

an instrument used to measure changes in the size of organ or the amount of blood moving through it

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2
Q

how does cold effect the amplitude?

A

it decreases

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3
Q

does the amplitude increase or decrease right after exercise?

A

it decreases

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4
Q

what happens to the heart rate immediately after exercise?

A

it increases

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5
Q

what equipment do we use to test volume pulse?

A

1) plethysmograph

2) powerlab computer software

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6
Q

what does more blood volume lead to?

A

more pressure and more flow

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7
Q

what does less blood volume lead to?

A

less pressure and less flow

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8
Q

what is the systolic pressure created from?

A

as the blood flows through the occluded artery

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9
Q

why is an artery smaller in diameter than veins?

A

because there is more pressure and a thicker tunica media

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10
Q

why does blood move faster in arteries than veins?

A

they have more pressure, they’re closer to the heart and cause the blood to move at a much higher rate

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11
Q

what happens to the heart rate wen the recording returns to normal?

A

it drops back down to normal rate

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12
Q

why does the heart increase slightly after the person stands up?

A

because of activity

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13
Q

what else does the factors that affect volume pulse effect?

A

arterial blood pressure

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14
Q

how does the cold affect peripheral blood vessels?

A

vasoconstriction in decreased temp

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15
Q

what is diastolic pressure?

A

the minimum pressure during diastole.

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16
Q

what is the first sound heard with the stethoscope?

A

the systolic pressure

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17
Q

what artery is the pulse customarily used?

A

radial artery

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18
Q

why does the amplitude decrease after exercise?

A

less blood flow through fingers so that more blood can go to muscles

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19
Q

what happens to the systolic pressure immediately after exercise?

A

it increases

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20
Q

does the amplitude increase or decrease when the person stands?

A

it temporarily increases

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21
Q

what is a sphygmomanometer?

A

an instrument used to measure peripheral blood pressure

22
Q

what does the change in volume pulse amplitude and heart rate indicate about changes in the volume of blood flowing through the finger?

A

a decrease in amplitude=a decrease in blood flow

23
Q

what are some other locations to take a pulse?

A

1) carotid artery (side of neck)
2) temporal artery (temple, above and outside of the eye)
3) brachial artery (inner side of biceps)
4) popliteal artery (behind knee)

24
Q

which vessels does blood move the slowest?

A

capillaries

25
Q

what is the formula to calculate heart rate from pulse rate?

A

beat/elapsed time (seconds) X 60 seconds/1 minute= heart rate (bpm)

26
Q

what is systolic pressure?

A

the peak pressure during ventricular systole

27
Q

what happens to diastolic pressure immediately after exercise?

A

it increases

28
Q

what does the point of complete cessation of sound indicate?

A

that the artery is no longer compressed even at the lowest pressure

29
Q

what is the purpose of getting a volume pulse?

A

it reflects the blood flow in peripheral circulation

30
Q

what happens to heart rate a few minutes after exercise?

A

it returns to normal

31
Q

which vessels does blood move fastest?

A

arteries

32
Q

how does heat effect the amplitude?

A

it increases

33
Q

does the heart rate increase or decrease after exercise?

A

increases

34
Q

what factors does the magnitude of the change in peripheral blood volume effect volume pulse? (4) (TBPE)

A

1) temperature
2) body position
3) physical activity
4) emotional state

35
Q

what happens to a persons heart rate after the person stands up?

A

it increases slightly

36
Q

when a person is standing what increases and from what?

A

hydrostatic pressure from gravity

37
Q

what happens to the systolic pressure a few minutes after exercise?

A

it returns to normal

38
Q

what is the amplitude?

A

the height of the volume pulse recording

39
Q

what instrument do you use to measure peripheral blood pressure?

A

a sphygmomanometer

40
Q

what is the pulse pressure?

A

the difference between systolic and diastolic pressure

41
Q

how does the amplitude of the volume pulse for the cooled finger compare to volume pulse for the recording at room temp?

A

the decrease in amplitude= peripheral vasoconstriction

42
Q

as the pressure continues to decrease after systolic pressure what happens to the sound?

A

it should become louder, then dull and muffled and then cease

43
Q

what does the cessation of sound determine?

A

the diastolic pressure

44
Q

why does blood move the slowest in capillaries?

A

it needs time to unload

45
Q

explain all the changes in terms of homeostasis?

A

body returns the heart rate back to normal

46
Q

what can the dicrotic notch be in some people?

A

in some people very distinct and in others absent

47
Q

which is smaller in diameter an artery or vein?

A

artery

48
Q

what happens to diastolic pressure a few minutes after exercise?

A

it returns to normal

49
Q

what is the dicrotic notch caused by?

A

the elastic recoil of an artery after the closure of the aortic valve

50
Q

what equipment do you need to measure peripheral blood pressure?

A

a sphygmomanometer and stethoscope

51
Q

what is a volume pulse?

A

a change in blood volume for each cardiac cycle

A&P 224 (25 decks)

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