906913
Description
Mind Map by eleanorbooty, updated more than 1 year ago
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Created by eleanorbooty
almost 11 years ago
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Haemoglobin
- The dissocciation curve
- Relates oxygen
saturation (sO2) to
Partial pressure
(pO2)
- Affinity
- How readily
oxygen can
attach to
haemoglobin
- How readily
oxygen can
attach to
haemoglobin
- Relates oxygen
saturation (sO2) to
Partial pressure
(pO2)
- Bohr shift
- Shifts right
- due to increase in
- CO2 concentration
- All of which cause the
haemoglobin to bind to oxygen
with lower affinity
- All of which cause the
haemoglobin to bind to oxygen
with lower affinity
- Temperature
- Hydrogen ion (acidity)
- CO2 concentration
- due to increase in
- CO2 + Lactic
acid build up
occurs with the
use of muscles
- Lowering the
affinity is the
body's way of
dealing with
problem quickly
and transporting
more oxygen to
the cells
- Lowering the
affinity is the
body's way of
dealing with
problem quickly
and transporting
more oxygen to
the cells
- Releases the oxygen
- Shifts right
- foetal haemoglobin
- HbF = Foetal haemoglobin
- HbA= Adult haemoglobin
- Structurally different to HbA
- gives it a higher affinity than HbA
- gives it a higher affinity than HbA
- dissociation curve if shifted to the left
- foetal arterial
pressures are lower
than the adult arterial
oxygen pressures
- Higher affinity allows
it to bind to oxygen at
lower partial pressure
- Allowing the diffusion
of oxygen across the
placenta
- Allowing the diffusion
of oxygen across the
placenta
- Higher affinity allows
it to bind to oxygen at
lower partial pressure
- foetal arterial
pressures are lower
than the adult arterial
oxygen pressures
- Sickle cell anaemia
- If HbA is replaced with
HbF it could counteract
the problem
- Cells are sickle shaped and
due to this structural difference
has a lower affinity for oxygen
- If HbA is replaced with
HbF it could counteract
the problem
- Holds on to more oxygen
- HbF = Foetal haemoglobin
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