Ch 13

Question 1

PAO2

Answer 1

Partial pressure of O2 in ALVEOLAR chambers

Question 2

PaO2

Answer 2

Partial pressure of O2 in arterial blood

Question 3

SaO2%

Answer 3

Percent saturation of O2 in ARTERIAL blood with O2

Question 4

PvO2:

Answer 4

Partial reassure of O2 in venous blood

Question 5

PACO2

Answer 5

Partial pressure of CO2 in ALVEOLAR chambers

Question 6

PaCO2

Answer 6

Partial pressure of CO2 in ARTERIAL blood

Question 7

PvCO2:

Answer 7

Partial pressure of CO2 in venous blood

Question 8

Partial Pressures represent:

Answer 8

Average pressure exerted against the alveolar capillary membrane

Question 9

Ambient Air pressure is

Answer 9

760mmHg

Question 10

Patmos=

Answer 10

Partial pressure= %concentration of gas x total pressure
PO2= .2093 x 760mmHg
=159mmHg

Question 11

O2 %

Answer 11

20.93%

Question 12

CO2%

Answer 12

0.03%

Question 13

N2%

Answer 13

79.04%

Question 14

PCO2 mmHg

Answer 14

0.2 mmHg

Question 15

PN2

Answer 15

600mmHg

Question 16

PAO2

Answer 16

Partial pressure of O2 in alveolar chambers
103mmHg

Question 17

Water vapour

Answer 17

47mmHg

Question 18

PaCO2

Answer 18

Partial pressure arterial carbon dioxide
39mmHg40mmHg

Question 19

PCO2

Answer 19

46mmHg

Question 20

PaO2

Answer 20

98-100mmHg

Question 21

Oxygen Partial Pressure values highest to lowest to know:

Answer 21

PatmosO2: 159mmHg
PAO2: alveolar: 103mmHg
PaO2: arterial: 98%
PO2: mean capillary: 40mmHg
Myoglobin: 2-3

Question 22

Oxyhemoglobin

Answer 22

Binding of O2 to hemoglobin
-hemoglobin contains iron which binds to O2

Question 23

100% saturation is when:

Answer 23

O2 bound to hemoglobin equals the O2 carrying capacity of hemoglobin
Usually never 100%, usually about 97-98%

Question 24

Oxyhemoglobin Curve is:

Answer 24

S-shaped, sigmoidal
-usually near complete saturation of PO2 at 60mmHg and higher

Question 25

Higher partial pressure allows for:

Answer 25

More O2 carrying capacity

Question 26

Arterial blood PAO2 is at

Answer 26

98-100 mmHg
-almost complete saturation

Question 27

Capillary- tissue (muscle) PO2 is:

Answer 27

40mmHg
-causes dissasociation of O2 from hemoglobin, allowing O2 to be available for muscle

Question 28

Carbon Dioxide Transport in the Blood

Answer 28

Around 5% transported in plasma
60-80% of total CO2 transports in combo with water as bicarbonate -binds with H+ to form carbonic acid which splits into CO2 and H2O in lungs
20% bound with hemoglobin

Question 29

Vi or VE

Answer 29

Minute ventilation
-amount of all air breathed in 1 minute (L/min or ml/min)
VE= VT (tidal volume) x F (frequency)

Question 30

VA

Answer 30

Alveolar ventilation
-amount of air available for gas exchange
VA= (VT (tidal) - dead space) x F (frequency)

Question 31

Partial pressure of O2

Answer 31

159mmHg
-under conditions of normal atmospheric pressure

Question 32

PAO2

Answer 32

Alveolar partial pressure
103mmHg

Question 33

PaO2

Answer 33

Arterial Partial Pressure
98-100mmHg

Question 34

PO2

Answer 34

Muscle partial pressure
40mmHg

Question 35

PO2

Answer 35

Muscle partial pressure
40mmHg

Question 36

Oxyhemoglobin disassociation curve

Answer 36

97-98% saturated at most
>60mmHg = almost complete saturation
<60mmHg= increased disassociation =release of O2