Gaseous Transports Flashcards
1
Q
What are the features of erythrocytes?
A
- Biconcave disk (increase surface area)
- Can fold to fit through capillaries
- Contains haemoglobin (aids O2 transport)
- No nucleus (more space for haemoglobin)
2
Q
What is the function of erythrocytes?
A
Transport CO2 and O2 around the body
3
Q
What allows haemoglobin to bind with oxygen?
A
Iron ion Fe2+
4
Q
How many haem groups is haemoglobin made up of?
A
4
5
Q
Each haem group contains…
A
…an iron ion
6
Q
How many polypeptide chains does haemoglobin contain?
A
4 (2 beta, 2 alpha)
7
Q
What does haemoglobin and oxygen bind to create?
A
Oxyhaemoglobin
8
Q
What does associate mean?
A
Bind with
9
Q
What does dissociate mean?
A
Release
10
Q
What does affinity mean?
A
Ability to bind
11
Q
Where does the body oxygen associate?
A
In the lungs
12
Q
Where does the body oxygen dissociate?
A
In tissue
13
Q
Where if the most affinity?
A
In lungs
14
Q
What are the 3 ways CO2 can be transported?
A
- In solution - dissolved in blood plasma (5%)
- Combining with haemoglobin (carbamino haemoglobin) (10%)
- Hydrogen carbonate (or bicarbonate) ions (85%)
15
Q
When CO2 is binds to the polypeptide chain…
A
…O2 is released from the haem site
