The Japanese word for Japan is æ¥æ¬, which is pronounced Nippon or Nihon and literally means the origin of the sun. The earliest record of the name Nihon appears in the Chinese historical records of the Tang dynasty, the Old Book of Tang.
Primary versus Secondary Immune Response The primary immune response occurs the first time that the immune system comes in contact with the antigen.
A second feature of the specific immune response is that it demonstrates memory. The immune system remembers if it has seen an antigen before and it reacts to secondary exposures to an antigen in a manner different than after a primary exposure.g class variation-In the primary response the major class of antibody produced is IgM whereas in the secondary response it is IgG (or IgA or IgE) (Figure 4). The antibodies that persist in the secondary response are the IgG antibodies.