Flashcards in Haemoglobin Deck (21):
Where is haemoglobin found in humans?
In red blood cells
How many polypeptide chains does a haemoglobin molecule have
Describe what is meant by haemoglobin 'loading' and 'unloading' oxygen
Loading describes oxygen binding with/ joining to haemoglobin
Unloading describes haemoglobin being released from/leaving haemoglobin
What is formed when oxygen is loaded onto haemoglobin
What is shown on an oxygen disassociation curve
How saturated haemoglobin is with oxygen at any given partial pressure of oxygen
Why does the binding of a single oxygen molecule increase haemoglobin's affinity for oxygen
It changes the shape of haemoglobin in a way that makes it easier for other oxygen molecules to join too
Where in the body would you find cells with a high partial pressure of oxygen. Explain your answer
In the alveoli/lungs.
This is the site where oxygen first enters the blood so it has the highest concentration of oxygen
Does haemoglobin have a primary, secondary, tertiary or quaternary structure
What kind of bio,obi all molecule is haemoglobin
How many polypeptide chains is haemoglobin made up of
Each chain contains a group containing iron what is this group called
A haem group
What does a haem group do to haemoglobin in terms of its aesthetics
Gives haemoglobin it's red colour
Each molecule of haemoglobin can carry how many oxygen molecules?
Where in the body does oxygen bind to haemoglobin in red blood cells to form Oxyhaemoglobin?
Where in the body does oxygen leave haemoglobin
Near body cells
When cells respire they use up oxygen, what does this do to the partial pressure of oxygen?
Red blood cells deliver Oxyhaemoglobin to what kind of body tissues
Roughly describe the features of the alveoli in lungs in terms of oxygen concentration, affinity, partial pressure etc.
- HIGH oxygen conc.
- HIGH partial pressure of oxygen
- HIGH affinity
- therefore, oxygen LOADS
Roughly describe the features of the respiring tissues in the body in terms of oxygen concentration, affinity, partial pressure etc.
- LOW oxygen concentration
- LOW partial pressure of oxygen
- LOW affinity
- therefore, oxygen UNLOADS
The affinity of haemoglobin for oxygen affects what
How saturated the haemoglobin is