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WorksheetsHaemoglobin and gas exchange
Total questions: 15
Worksheet time: 7mins
How many polypeptide chains does Haemoglobin (Hb) consist of?
One
Two
Three
Four
Where in the Hb molecule do molecules of oxygen bind?
To the haem group
To amino acids in the polypeptide chains
In the cytoplasm of the erythrocyte
In the plasma
Which ion does Haemoglobin (Hb) contain in the haem group?
Chloride
Iron (Fe2+)
Iron (Fe3+)
Protons
Which of the following is not a means by which carbon dioxide is carried in the blood?
Dissolved in the plasma as CO2
Dissolved in the plasma as HCO3-
Dissolved in the cytoplasm of the erythrocyte as HCO3-
Bound to Hb directly
Which of the following is true about formation of oxyhemoglobin?
it forms when pO2 is low and dissociates when pCO2 is low
it forms when pO2 is low and dissociates when pCO2 is high
it forms when pO2 is high and dissociates when pCO2 is high
it forms when pO2 is high and dissociates when pCO2 is low
Using the graph, what does graph A represent?
graph of fetal haemoglobin
graph of sickle celled haemoglobin
graph of adult haemoglobin
graph of denatured haemoglobin
What is the name of the molecule formed when oxygen binds to haemoglobin?
oxyhaemoglobin
oxygen-haemoglobin
carbaminohaemlobin
oxyglobin
What colour line represents the oxygen saturation curve during intense exercise?
blue
black
red
Gases will diffuse from areas of _______ pressure
low to high
high to low
Partial pressure of oxygen can be abbreviated to
(a)
CO2 is transported –
By RBC
As bicarbonates
In a dissolved state through plasma
All
The maximum volume of air a person can breathe in after a forced expiration is known as :
Total Lung Capacity
Expiratory Capacity
Vital Capacity
Inspiratory Capacity
What is the significance of foetal haemoglobin having a higher affinity for oxygen?
Prevents oxygen from binding to haemoglobin
Increases the risk of carbon dioxide poisoning
Causes respiratory issues in newborns
Allows the foetus to obtain oxygen from the mother's blood
What is the Bohr effect in relation to haemoglobin?
Decrease in blood pH due to low oxygen levels
Enhancement of oxygen binding in the muscles
Reduction in oxygen affinity due to high carbon dioxide levels
Increase in oxygen saturation in the lungs
Why does the oxygen dissociation curve shift to the right when carbon dioxide levels increase?
Increase in oxygen saturation in the blood
Reduction in blood pH
Enhanced binding of oxygen to haemoglobin
Lowering of haemoglobin's affinity for oxygen
