Transport of Carbon Dioxide in Mammals (1 Viewer)

[superSAIyan2]

Well CO2 is transported in three ways right- as carbaminohaemoglobin, hydrogen carbonate ions or dissolved in plasma.


When i was reading my textbook it said minimal CO2 is dissolved in plasma to prevent excess H2C03 as this increases acidity of blood. But C02 is dissolved in water in the RBCs to form carbonic acid which is then converted into hydrogen carbonate ions and hydrogen ions. So do only HC03- ions get transported back into the blood plasma for transport around the body and the H+ ions remain in the RBC to prevent increasing acidity of the blood?

Is that right? Can someone please clarify for me?

Thanks

 

[Spiritual Being]

CARBON DIOXIDE:
• It is produced as a waste product of respiration in body cells and occurs in high concentrations. It is known to diffuse into the bloodstream from body cells and is carried in 3 ways After entering the bloodstream it may:
1. Be converted into carbonic acid and then changed into hydrogen carbonate ions. This change from carbon dioxide to carbonate ions happens on the red blood cells through the enzyme carbonic annhydrase. The ions are transported dissolved in the plasma (only 70% of the carbon dioxide).
2. 23% of CO2 binds to haemoglobin and forms carbaminohaemoglobin
3. 7% is dissolved directly in the plasma

 

[superSAIyan2]

Thanks for the help. So in onetype of transport C02 is directly dissolved in plasma (to form HCO3- and H+) whereas in another type of transport it is in the bloodstream as only HCO3-

 

[Aysce]

Thanks for the help. So in onetype of transport C02 is directly dissolved in plasma (to form HCO3- and H+) whereas in another type of transport it is in the bloodstream as only HCO3-

The first part was correct but what you're saying here, I don't think is correct. It's either dissolved in the plasma to form HCO3- then H+ or attached to haemoglobin as carbaminohaemoglobin as mentioned by Spiritual being.