Everything you need to know about immunology. Some of the frequently asked questions are as follows:- Q.1. What is immunology? Ans. Study of a host's specific defense to a pathogen or a foreign substance is called immunology. Q.2. What is an antigen? Ans. A substance which on entering a body causes formation of antibodies and reacts only with a specific [...]
Human blood can be classified into different blood group systems, e.g. ABO blood group, MN blood group and Rh blood group. All of these blood groups in man are under genetic control, each series of blood groups being under the control of genes at a single locus or of genes that are closely linked and behave in heredity as though [...]
The mechanism of humoral immunity is accomplished after interaction of antigen with B-cells, antibody production and antigen-antibody binding. 1. Interaction of antigen with B-cells: The B-cells after production from the stem cells (Fig. 22.8) migrate to lymphoid organs. When antigen interacts and contacts the receptor, the later gets stimulated. The B-cells differentiate into antibody producing cells through three steps: activation, [...]