Haemoglobin-AS Unit 2

I just need to know a few definitions, appreciate any help :smile:

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Associate,Dissociate,Loading,Unloading,Affinity and Partial pressure.

Hi there!

Since you only asked for definitions relating to haemoglobin, I hope these help:

Association: The joining of two molecules to form one single molecule; haemoglobin and oxygen associate to form oxyhaemoglobin.

Dissociation: The breakdown of a molecules into two separate molecules; oxyhaemoglobin dissociate to form haemoglobin and oxygen.

Loading: When the haemoglobin loads oxygen molecules (and obviously becomes an oxyhaemoglobin).

Unloading: When the haemoglobin unloads the oxygen molecules due to release in pressure.

Affinity: The attractive force between substances or particles; or just simply, the attraction for something. For example, the haem group (of the haemoglobin) has an affinity (attraction) for oxygen.

Partial pressure: The proportion of total pressure provided by a particular gas as part of a mixture of gases.

You might want to recheck the definitions for loading and unloading though.