PPT3 Gas Diffusion

Question 0

Movement from high to low concentrations and from high to low pressures are called

Answer 0

Diffusion gradient

Question 1

What is diffusion?

Answer 1

Net movement of molecules

Question 2

Pressure in the air equals the pressure In the alveolus is _______

Answer 2

760mm

Question 3

Nitrogen takes up _____ of room air

Answer 3

79%

Question 4

O2 takes up _____ of room air

Answer 4

21%

Question 5

VCO2/VO2 is known as the

Answer 5

Respiratory exchange ratio

Question 6

Normal PAO2 is equal to

Answer 6

100

Question 7

Pulmonary arteries contain __________ blood

Answer 7

Mixed venous

Question 8

______ law of diffusion contains a cross sectional area (A), diffusion coefficient (D), thickness of membrane (T), and pressure gradient (P1-P2)

Answer 8

Ficks

Question 9

In this equation Vgas=[A x D (P1-P2)]/T the A stands for?

Answer 9

Surface area

Question 10

In this equation Vgas=[A x D (P1-P2)]/T the D stands for?

Answer 10

Diffusion coefficient (solubility)

Question 11

In this equation Vgas=[A x D (P1-P2)]/T the P1-P2 stands for?

Answer 11

Diffusion gradient

Question 12

In this equation Vgas=[A x D (P1-P2)]/T the T stands for?

Answer 12

Thickness of membrane

Question 13

The greater the surface area, solubility coefficient, and pressure gradient the ________the diffusion rate

Answer 13

Greater

Question 14

The greater the surface area, solubility coefficient, and pressure gradient the greater the diffusion rate - in this statement how are these qualities related?

Answer 14

Directly

Question 15

Who’s law states “The greater the surface area, solubility coefficient, and pressure gradient the greater the diffusion rate”

Answer 15

Ficks

Question 16

The greater the membrane thickness the _______ the diffusion rate

Answer 16

Slower

Question 17

The greater the membrane thickness the slower the diffusion rate, how is this related?

Answer 17

Inversely

Question 18

Who’s law states “The greater the membrane thickness the slower the diffusion rate”

Answer 18

Ficks

Question 19

CO2 travels ________ across membrane

Answer 19

Fast

Question 20

O2 travels _____ across membrane

Answer 20

Slow

Question 21

Who’s law states “Gas diffusion rate is inversely proportional to the square root of its gram molecular weight (density)…….the lighter the gas the faster the diffusion”

Answer 21

Grahams

Question 22

The statement “the lighter the gas = faster diffusion” means they are _________ related

Answer 22

Inversely

Question 23

Who’s law states “gas diffusion is directly proportional to the gas partial pressure” (greater pressure = greater diffusion)?

Answer 23

Henrys

Question 24

The statement "the greater the pressure = the greater the diffusion" are _________ related

Answer 24

Directly

Question 25

Capillary transit time = _______

Answer 25

.75 seconds

Question 26

The alveolar-capillary equilibrium occurs during the first _______seconds

Answer 26

25

Question 27

Increased blood flow and thickened alveolar capillary membrane will ________ to O2 transfer

Answer 27

Limits

Question 28

Thickened alveolar capillary membrane will limit CO2 __________

Answer 28

Diffusion

Question 29

Thickened alveolar capillary membrane will limit N2O ____________

Answer 29

Perfusion

Question 30

The distance from alveolar gas to red blood cell is ___________

Answer 30

<0.1um

Question 31

Fibrosis, interstitial edema, alveolar fluid, and interstitial fibrosis will ______ the diffusion path

Answer 31

Increase

Question 32

Fibrosis, interstitial edema, alveolar fluid, and ___________ will increase the diffusion path

Answer 32

Interstitial fibrosis

Question 33

Fibrosis, interstitial edema, ____________ and interstitial fibrosis will increase the diffusion path

Answer 33

Alveolar fluid

Question 34

Fibrosis, ___________, alveolar fluid, and interstitial fibrosis will increase the diffusion path

Answer 34

Interstitial edema

Question 35

__________, interstitial edema, alveolar fluid, and interstitial fibrosis will increase the diffusion path

Answer 35

Fibrosis

Question 36

If you have a thick membrane you will have _______ O2 diffusion

Answer 36

Less

Question 37

What are three barriers of diffusion?

Answer 37

Alveolar epithelium, interstitial space, and capillary endothelium

Question 38

Gas movement between lungs and tissues is by ________

Answer 38

Diffusion

Question 39

Normal PaCO2 is_____

Answer 39

40

Question 40

If patients CO2 level is low they might be _______

Answer 40

Hyperventilating

Question 41

Which gas "takes the hit" if another gas is taking up more of the alveolar space

Answer 41

Nitrogen

Question 42

The term _______ ________ means that nitrogen is lessened due to heightened CO2 or O2 levels in the alveoli

Answer 42

Nitrogen washout

Question 43

PAO2=(Pb-47)(FiO2)-PaCO2 x 1.25 is called the _____________

Answer 43

Alveoli air equation

Question 44

In the equation PAO2=(Pb-47)(FiO2)-PaCO2 x 1.25 the PAO2 stands for?

Answer 44

Alveoli pressure of oxygen

Question 45

In the equation PAO2=(Pb-47)(FiO2)-PaCO2 x 1.25 the Pb stands for?

Answer 45

Bariatric pressure (760mm

Question 46

In the equation PAO2=(Pb-47)(FiO2)-PaCO2 x 1.25 the 47 stands for?

Answer 46

Moisture level (humidity from nose)

Question 47

In the equation PAO2=(Pb-47)(FiO2)-PaCO2 x 1.25 the FiO2 stands for?

Answer 47

Fractional inspired level of oxygen (if no o2 therapy in place then number will be .21 which is percent of oxygen in the room)

Question 48

In the equation PAO2=(Pb-47)(FiO2)-PaCO2 x 1.25 the PaCO2 stands for?

Answer 48

Arterial pressure of carbon dioxide (normally 40)

Question 49

If PaO2 is greater than 130 then the patient must be_______

Answer 49

Breathing supplemental O2

Question 50

Why does CO2 diffuse faster than O2 if it's a heavier gas?

Answer 50

Because its of more solubility