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 top five techniques used for detecting antigens in the serum. The techniques are: 1. Complement Fixation Test 2. Fluorescent Antibody Technique 3. Enzyme-Linked Immunosorbent Assay 4. Radioimmunoassay 5. Radioallergosorbent Test. Technique # 1. Complement Fixation Test: In a reaction between an antigen with its cognate antibody present in serum, the complement disappears from the serum [...]