Haemoglobin & Oxygen Flashcards
1
Q
what’s the Bohr effect?
A
when respiration rates INCREASE, there is an INCREASE amount of CO2 in blood which leads to build up of carbonic acid. this lowers the pH of blood & causes haemoglobin in blood to release O2
- this is how muscles can continue at the same rate during exercising
2
Q
describe haemoglobin
A
- found in RBC
- carries 4 O2 molecules
- transports O2
- removes CO2 as waste
- oxyhaemoglobin = oxygenated
3
Q
describe myoglobin
A
- found in muscle cells
- O2 and Fe bonding protein which releases O2 to muscle cells when O2 conc = low
- carries 1 O2 molecule
- acts as O2 store
- oxymyoghobin = oxygenated
4
Q
describe foetal haemoglobin
A
- foetus can’t breathe without lungs
therefore relies on diffusion of O2 from mothers blood - has a higher affinity for O2 & is more efficient at extracting O2 from maternal circulation
5
Q
where is O2 loaded and unloaded
A
L = lungs
UL = respiring cells
6
Q
where is CO2 loaded and unloaded
A
L = respiring cells
UL = lungs
7
Q
how is alveoli adapted for G.E
A
- thin for shorter diffusion pathway
- large s.a for more diffusion to occur
8
Q
how do the gases move
A
diffusion, from high conc to low conc
9
Q
where does O2 diffuse from and to
A
air in alveoli to blood
10
Q
where does CO2 diffuse from and to
A
blood to air in alveoli
