gas transport in blood

Question 1

what defines hypoxemia

Answer 1

state of low paO2

Question 2

what carries the blood O2

Answer 2

98% Hb and the rest dissolved in plasma

Question 3

what must O2 do before it can be bound by Hb

Answer 3

dissolve into plasma

Question 4

what color are reduced and O2 Hb

Answer 4

reduced - blue

with O2 - red

Question 5

what is normal arterial and venous pO2

Answer 5

atrerial - 90torr (sat 98%)
venous 40torr (sat 75%)

Question 6

how to increase 95% plus O2 Sat

Answer 6

trick! you can’t!

Question 7

where on pO2/sat curve does uptake occur

Answer 7

on the steep part

Question 8

4 factors that cause a Rward shift of O2 curve

Answer 8

1. low pH
2. high temp
3. high 2,3 diphosophglyceride
4. high CO2

Question 9

what is the P50

Answer 9

the paO2 at which Hb is 50% saturated

Question 10

what is normal P50

Answer 10

27 torr

Question 11

what happens to P50 if curve is shifted to right

Answer 11

goes up

Question 12

what happens in mutation causing Hb to have inreased affiinty for O2

Answer 12

shift left - no release at capils. > need to produce more EPO and more cells

Question 13

***what happens to PaO2 in anemia

Answer 13

unchanged

Question 14

what happens to O2 sat in anemia

Answer 14

unchanged

Question 15

what happens to O2 content in anemia

Answer 15

drops

Question 16

how does CO change O2 curve

Answer 16

makes it hyperbolic - and thus decreases delivery

Question 17

what are three forms of CO2 in blood

Answer 17

1. bicarb
2. dissolved in plasma
3. in carbaminoHb

Question 18

where is most CO2 carried in blood

Answer 18

dissolved in plasma - 20x more soluble

Question 19

how does CO2 help Hb release O2

Answer 19

makes red cell acid > lessens Hb affinity

Question 20

what holds more CO2, reduced or O2 Hb?

Answer 20

reduced

Question 21

what is shape of CO2 curve

Answer 21

linear

Question 22

what is art./vein diff for CO2

Answer 22

7

Question 23

what is art./vein diff for O2

Answer 23

50