Question

Identify the theory that states that a specific antigen (infection) activates only a matching pre-existing group of lymphocytes with receptors that bind to that antigen, causing an interaction between receptor and antigen which induces that particular lymphocyte to multiply and produce many identical clones.

Group of answer choices

Innate immunity

Clonal selection

All of the answers are correct.

Trichinella spiralis

Common Immune Activation Theory

Answer 1

Answer - clonal selection.

The theory states that the generation of specificity in antibody occurs through activation of a pre-existing group of lymphocytes . The receptor bind to that antigen and that specific antigen activates only its counter-specific cell. This occurs in lymphoid organs such as the spleen and the lymph nodes. The clonal selection is specifically a function of B cells . While innate immune system has barriers for the protection of body from pathogen such as eye , skin , respiratory tract and defense the body throgh mucus , tears , saliva, sweat and other secretion. Hence it is not involved in activatation of only a matching pre-existing group of lymphocytes with receptors that bind to that antigen.

Trichinella spiralis is a nematode found in meat and pork .