Welcome to the Quiz!
This quiz contains 9 questions from a mix of 1 subtopics.
Which of the following best describes how haemoglobin transports oxygen in the blood?
oxygen is transported dissolved in the plasma
oxygen binds to iron in haem groups forming oxyhaemoglobin
oxygen binds directly to red blood cells
oxygen binds to white blood cells
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How many oxygen molecules can each haemoglobin molecule carry?
2
1
3
4
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Where does most oxygen dissociate from haemoglobin?
at respiring body cells
in the arteries
in the lungs
in the heart
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What happens when haemoglobin binds with one oxygen molecule?
it becomes harder for more oxygen to bind
it changes shape so it becomes easier to bind another oxygen
it releases all bound oxygen
it breaks apart into individual subunits
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How does fetal haemoglobin differ from adult haemoglobin?
fetal haemoglobin has higher oxygen affinity
fetal haemoglobin can carry more oxygen molecules
fetal haemoglobin cannot bind oxygen
fetal haemoglobin has lower oxygen affinity
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What is the Bohr effect?
haemoglobin has a lower affinity for oxygen at higher pCO2
haemoglobin has a higher affinity for carbon dioxide at higher pO2
haemoglobin has a higher affinity for oxygen at higher pCO2
haemoglobin has a lower affinity for carbon dioxide at higher pO2
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What happens to the oxygen dissociation curve during the Bohr effect?
it shifts to the right
it becomes flatter
it becomes steeper
it shifts to the left
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What happens to the hydrogen carbonate ions (HCO3-) produced in red blood cells during the Bohr effect?
they are immediately converted back into CO2
they are used to produce more carbonic acid
they bind to haemoglobin
they leave the red blood cells and are transported via plasma
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In the capillaries in the lungs, oxygen binds to in haem groups forming oxyhaemoglobin.
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