Memory

Definition

Memory in adaptive immunity refers to the immune system's ability to recognize and respond more effectively to pathogens that it has encountered previously. This is a crucial aspect of the body's specific defense mechanisms.

5 Must Know Facts For Your Next Test

1. Memory cells are a type of lymphocyte, including both B cells and T cells, that remain in the body after an initial infection has been eliminated.
2. Upon re-exposure to the same pathogen, memory cells rapidly proliferate and initiate a strong immune response.
3. Memory B cells can quickly produce large quantities of antibodies when they encounter their specific antigen again.
4. Memory T cells can rapidly differentiate into effector T cells upon re-infection, providing faster cellular immunity.
5. Vaccinations work by creating memory cells without causing disease, thus preparing the immune system for future encounters with the pathogen.

Review Questions

Related terms

Antigen:

A molecule or molecular structure that is recognized by the immune system as foreign and can provoke an immune response.

Lymphocyte: A type of white blood cell that is part of the adaptive immune system, including B cells and T cells.

Effector Cells: Activated lymphocytes that actively respond to a pathogen during an immune response.