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Respiratory System > Respiratory Physiology: The Physics of Breathing > Flashcards

Respiratory Physiology: The Physics of Breathing Flashcards

1
Q
  1. How is pressure typically measured
A

mm Hg

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2
Q

what is the value of atmospheric pressure

A

760 mm Hg

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3
Q

what does PaO2 stand for

A

Partial pressure of oxygen in the arterial blood

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4
Q

what does TV stand for

A

Tidal Volume

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5
Q

what does PACO2 stand for

A

partial pressure of carbon dioxide in the alveoli

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6
Q

what does PIO2 stand for

A

stands for partial pressure of inspired oxygen

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7
Q

what does Q mean

A

Blood flow per unit time (blood perfusion for example)

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8
Q

what is Tidal volume?

A

The amount of air you inspire per each individual breath

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9
Q
  1. What percentage of the atmosphere is nitrogen
A

78%

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10
Q

what percentage of the atmosphere is Oxygen

A

21%

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11
Q

what percentage of the atmosphere is carbon dioxide

A

0.033%

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12
Q

what 3 molecules, plus unnoted ones we don’t need to know due to too low significance, make up the rest of the atmospheric components

A
  • water vapour
  • Krypton
  • Argon
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13
Q

What does mmHg mean?

A

millimeters of mercury

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14
Q
  1. What does cmH2O mean
A

centimetres of water

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15
Q
  1. what is 10cmH2O in mmHg and 1cmH2O in Pa
A

10cmH2O = 7.36 mm Hg

1 cmH2O = 98.0665 Pa

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16
Q

what does kPa x 10 equal

A

equals cmH2O

17
Q

what does kPa x 7.5 equal

A

equals mmHg

18
Q

what is the SI unit of pressure

A

kPa

19
Q

what are the 2 components of Boyle’s law

A
  1. Compressing the molecules by half doubles the pressure and vice versa
  2. Pressure is inversely proportional to volume
20
Q

what equation denotes Boyle’s law

A

P1V1 = P2V2

21
Q
  1. what is Charles’ law
A

Pressure is proportional to temperature

22
Q

what are the 2 components of Dalton’s law

A
  1. all gas molecules exert pressures which make up the partial pressures
  2. Adding all the partial pressures gives the Total pressure
23
Q

what is henry’s law

A

The number of gas molecules dissolved in liquid is proportional to the partial pressure of the gas molecules

24
Q

what does the content of dissolved gas depend on

A

The content of dissolved gas depends on the solubility of the gas

25
Q
  1. What equation links content, solubility and partial pressure
A

Content = solubility x partial pressure

26
Q
  1. How many more times soluble is CO2 compared to O2
A

20x

Respiratory System (11 decks)

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