History. 1  Among first inhabitants were the Penteka. 2  1849 Capt. Randolph Marcy, U. S. Army engineer passes through scouting out West Texas to California routes. 3  1858 The Texas legislature establishes Taylor County from Bexar and Travis counties. The county is named for Alamo defenders Edward, James, and George Taylor.
When an antibody attaches to an antigen, it helps the body destroy or inactivate the antigen. antigen âa substance or molecule that is recognized by the immune system. The antigen can be from foreign material such as bacteria or viruses.antiserum âa serum rich in antibodies against a particular microbe.nnate âan immune system function that is inborn and provides an all-purpose defense against invasion by microbes. interferon âa protein produced by cells that stimulates antivirus immune responses or alters the physical properties of immune cells.
Complement is activated by antigen-antibody complexes and causes holes to form in the plasma membrane of foreign microbes or cells (lysis). The complement system is considered a nonspecific defense, but it can be activated against specific microbes that have been marked with antibodies.nything that can trigger the immune response is called an antigen. An antigen can be a microbe such as a virus, or even a part of a microbe. Tissues of cells from another person also carry nonself markers and act as antigens.