The oxyhaemoglobin dissociation curve is steepest at the O2 concentrations that occur in the tissues. True or false?
True
5 of 16
What does a rightward shift of the oxyhaemoglobin curve signify (Bohr effect)?
Reduced oxygen affinity and higher P50
6 of 16
In what situations would a rightward shift of the oxyhaemoglobin curve occur (Bohr effect)?
Increased CO2, H+, temperature and 2,3-DPG
7 of 16
What causes a leftward shift in the oxyhaemoglobin curve?
Increased ventilation
8 of 16
A pulse oximeter would be useful in identifying patients who have anaemia (low [Hb]). True or false?
False
9 of 16
Foetal Hb has a higher affinity for O2 and so a rightward shift in the dissociation curve. True or false?
False
10 of 16
CO2 can bind to the amino group of Hb (and other proteins) in order to be carried around the blood. True or false?
True
11 of 16
What % of CO2 is transported through the blood dissolved in plasma?
10%
12 of 16
Where is the enzyme carbonic anhydrase found?
RBC
13 of 16
O2 content is higher than CO2 content. True or false?
False
14 of 16
What is the process of CO2 entering a RBC and converting to HCO3- via carbonic anhydrase, which is exchanged for Cl- and carried in plasma, the H+ binds with Hb and aids O2 release so more CO2 can form carbamino compounds called?
The haldane effect
15 of 16
What buffers the H+ produced by the reaction between CO2 and H2O (mediated by carbonic anhydrase)?
Hb
16 of 16
Other cards in this set
Card 2
Front
What is the equation for Hb saturation?
Back
% saturation = O2 bound to Hb/O2 capacity x 100
Card 3
Front
What is the value for arterial Hb saturation?
Back
Card 4
Front
What is the value for mixed venous Hb saturation?
Back
Card 5
Front
The oxyhaemoglobin dissociation curve is steepest at the O2 concentrations that occur in the tissues. True or false?
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