What Is Adaptive Immunity?

Adaptive immune response (adaptive immune response) refers to the whole process of antigen-specific T / B lymphocytes in vivo activated, proliferated, and differentiated into effector cells after receiving antigen stimulation.

Adaptive immune response

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Adaptive immune response refers to the body

According to the types of immune response cells and their mechanisms, adaptive immune responses can be divided into B cell-mediated

The adaptive immune response can be artificially divided into the following three parts: 1. Recognizing the activation stage: refers to

The main characteristics of adaptive immune response are as follows: 1. Recognition of "self" and "non-self" characteristics, that is, antigen-specific T lymphocytes and B lymphocytes usually develop natural immune tolerance to their normal tissue cells, and have non-antigenicity Foreign body produces immune rejection reaction; 2. Specificity means that the body can only produce an immune response specific to that antigen after being stimulated by an antigen, and the corresponding immune response products (antibodies and effector T cells) can only respond to this antigen. It interacts with target cells expressing this antigen, but cannot respond to other antigens; 3. Memory is the stage of antigen-specific T / B lymphocyte proliferation and differentiation, and some TB lymphocytes stop differentiation in the middle and become resting. Immune memory cells. When the body comes into contact with the same antigen again, these long-lived immune memory cells can rapidly proliferate and differentiate into immune effector cells, producing corresponding humoral and / or cellular immune effects.