Carbon dioxide (co2) dissolves poorly in plasma. while it can be carried by hemoglobin, the ability of red blood cells to transport it on hemoglobin is limited. thus, 70 percent of the co2 that leaves the body is carried out in a third way. explain what happens

There are 3 ways that CO2 is transported in the body;

1.       Carbonic acid

2.       Dissolved carbon dioxide in plasma

3.       Red blood cells

The answer is carbonic acid. In the tissues, some of the dissolved carbon dioxide in the plasma reacts with the water to form carbonic acid which is also used by the body as a pH buffer. This is catalyzed by a carbonic anhydrase enzyme. In the alveoli, the carbonic acid reaction is reversed by the same enzyme back to water and carbon dioxide (which is respired out).

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."