1 The dance form of ballet was invented during the Italian Renaissance of the 15th and 16th centuries. 2  Some of the favorite foods of the nobles were large birds such as swans, peacocks, and herons. 3  Music and dancing was a popular form of entertainment and big part of Renaissance daily life.
CEA is a protein marker indicative of several types of cancers, especially colon cancer. The CEA normal levels are different for smokers and nonsmokers. Usually, for adult nonsmokers, the normal CEA levels range from 0 to 2.5 mcg/l.For adult smokers, the levels are slightly higher, and normal levels range from 0 to 5.0 mcg/l. This difference in normal values is because smokers usually produce more CEA than nonsmokers.he CEA test is performed to monitor the severity of cancer or tumors in the patients. The values obtained after the CEA test indicates the response of body to the therapy. So, CEA values are used as a marker mainly for colon cancer.
The best use of CEA is as a tumor marker, especially for cancers of the gastrointestinal tract. When the CEA level is abnormally high before surgery or other treatment, it is expected to fall to normal following successful surgery to remove all of the cancer.EA is a type of glycoprotein molecule that is produced by cells of the gastrointestinal tract during embryonic development. It is produced in very small amounts after birth. The level of CEA in the bloodstream is thus relatively low unless certain diseases-including certain forms of cancer-are present.