The following points highlight the five main components of human immunity system. The components are: 1. Origin and Differentiation of Lymphocytes 2. The Major Histocompatibility Complex 3. Cytokines 4. Antigen 5. Antibodies. 1. Origin and Differentiation of Lymphocytes: In adults, all kinds of blood cells originate from bone marrow stem cells. These are distinguished into two major types — the [...]
In this article we will discuss about the resistance of human body against foreign agents. While the innate non-specific defense mechanisms are present in the body since birth, the acquired resistance develops in the body only in response to a foreign agent. Such resistance is effective only against the agent which evokes the response and not to other agents. Thus, [...]
The following points highlight the three main types of serological reactions that occur in human body. The types are: 1. Neutralization 2. Precipitation 3. Agglutination. Serological Reaction: Type # 1. Neutralization: Neutralization is a type of serological reaction which occurs between a toxin and its antibody (antitoxin) or between a virus and its antiserum. The reaction is so named, because [...]