Antibodies protect against substances prior to cell infection. Antibodies are produced by a type of white blood cell called a B cell (B lymphocyte). B cells develop from stem cells in bone marrow. When B cells become activated due to the presence of a particular antigen, they develop into cells called plasma cells.ntibodies recognize specific antigens by identifying certain areas on the surface of the antigen known as antigenic determinants. Once the specific antigenic determinant is recognized, the antibody will bind to the determinant.
The Underground Railroad. For the 240 years from the first African slave until 1860, slaves ran and some escaped to freedom. In 1850, the value of a trained slave was around $2500 - an enormous sum at a time more than ten times the average person's annual earnings.
By Femi Lewis. The abolition of slavery began in 1688 when German and Dutch Quakers published a pamphlet denouncing the practice. For more than 150 years, the abolition movement continued to evolve and by the 1830s, both African-Americans and whites were fighting to end the institution of slavery in the United States. Prominent abolitionist William Lloyd Garrison said early in the 1830s, I will not equivocate...and I will be heard.. Garrison's words would set the tone for the transforming abolition movement, which would continue to build steam up until the Civil War.