What transports oxygen to the tissues?
Oxygen (O2)as we know is diffused through the lungs into the bloodstream. The oxygen carrying component within blood is in the red blood cell and is called haemoglobin. Haemoglobin carries four heme (iron) molecules which oxygen binds to when they diffuse across the Lungs alveolar membrane into the blood.
So how does oxygen get off the haemoglobin?
When the CO2 concentration gets to a certain level within the blood, this signals the heme to release the oxygen molecule. This is then diffused through the cells membrane and is consumed by the cell. If the CO2 levels in the blood get higher the heme releases its second molecule and so forth. This is called the Bohr effect
The Bohr effect: The dissociation curve for Oxy-haemoglobin is shifted to the right with increasing carbon dioxide or proton concentration in blood.
So how can i see this effect in exercise or sport?
“100m Man” William Trubridge (Scott, 2007)
This article is about a Breath hold diver that has been able to dive on a single breath for over 8 minutes!
But you say how did he do that? how did he not run out of oxygen?
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