Blood Gases

Front 1

state how many oxygen molecules hemoglobin can carry

Back 1

4

Front 2

list the sites on hemoglobin where oxygen and carbon dioxide bind

Back 2

oxygen binds on the iron center of heme

carbon dioxide binds to amino group of globin

Front 3

list the partial pressure of oxygen and carbon dioxide in alveoli

Back 3

pO2= 100 mm Hg

pCO2= 40 mm Hg

Front 4

list the partial pressure of oxygen and carbon dioxide in pulmonary arteries

Back 4

pO2= 40 mm Hg

pCO2= 45 mm Hg

Front 5

list the partial pressure of oxygen and carbon dioxide in pulmonary veins

Back 5

pO2= 100 mm Hg

pCO2= 40 mm Hg

Front 6

list the partial pressure of oxygen and carbon dioxide in systemic arteries

Back 6

pO2=100 mm Hg

pCO2= 40 mm Hg

Front 7

list the partial pressure of oxygen and carbon dioxide in systemic veins

Back 7

pO2= 40 mm Hg

pCO2= 40 mm Hg

Front 8

list the 2 mechanisms by which oxygen is transported in the blod

Back 8

dissolved in plasma & on hemoglobin

Front 9

list 4 factors which affect hemoglobin affinity for oxygen and how

Back 9

pO2

pH

pCO2

temperature

Front 10

define the "Bohr effect" and "Haldane effect"

Back 10

Bohr Effect: an increase in blood carbon dioxide level or a decrease in pH causes hemoglobin to bind to oxygen with less affinity.


Haldane Effect: the higher the pO2, the lower the hemoglobin affinity for CO2

Front 11

list the 3 mechanisms by which carbon dioxide is transported in the blood

Back 11

dissolved in plasma, on hemoglobin, as HCO3- [bicarbonate]

Front 12

describe what happens to carbon dioxide within the red blood cells

Back 12

as CO2 diffuses into systemic capillaries & enters RBCs, it reacts with H2O in the presence of the enzyme carbonic anhyrdase to form carbonic acid, which dissociates into H+ ions and bicarbonate (HCO3-)

Front 13

define the "chloride shift"

Back 13

as HCO3- moves into plasma, chloride ions move from plasma to RBC