haemoglobin and oxyhaemoglobin dissociation curves Flashcards
what are the four components of blood
red blood cells, white blood cells, platelets and plasma
how many polypeptide chains does haemoglobin have
four
what do the polypeptide chains bind to in haemoglobin that allows them to carry oxygen
haem groups
what enables haem groups to bind to oxygen
their iron ion
what is oxyhaemoglobin
haemoglobin which has 4 oxygen molecules
how many molecules of oxygen can a single iron ion bind to
one
what happens to haemoglobin each time an oxygen molecule binds to it
the quaternary structure changes, uncovering other iron ions
what is positive cooperativity
when the binding or unbinding of one particle makes it easier for another to bind or unbind
what happens to the haemoglobin when an oxygen molecule unbinds
the quaternary structure changes and it becomes easier to another oxygen molecule to unbind
what is oxygen association and disassociation
association is oxygen binding to the haemoglobin and disassociation is the unbinding
what does positive cooperativity allow oxygen to do
dissociate and associate rapidly from the haemoglobin
what causes oxygen to disassociate from the blood and enter the tissues
the oxygen partial pressure gradient
