Cytokines regulate acute and chronic inflammation in immune responses through a variety of complex pathways. They are produced by various immune cells (innate macrophages, dendritic cells, natural killer cells, adaptive T and B lymphocytes). 

Cytokines

The major histocompatibility complex (MHC) is a collection of genes coding for MHC molecules found on the surface of all nucleated cells of the body. There are two classes of MHC molecules involved in adaptive immunity:
- MHC I 
- MHC II

Major Histocompatibility Complex 

Antigen-presenting cells (APCs) include macrophages, dendritic cells, and B cells. APCs have the ability to present antigens specifically for the purpose of activating T cells.

Antigen-Presenting Cells

T cells function as the central orchestrator of both innate and adaptive immune responses.  T cells mature in the thymus. They are also responsible for destruction of cells infected with intracellular pathogens.

T Cells in the Adaptive Immune Response

Many cells and molecules work together to ensure our cellular immunity functions properly.
- T Cells 
- Major Histocompatibility Complex
- Cytokines
- Antigen-presenting Cells

Austin Community College

Cellular immunity is the branch of our adaptive immunity that targets intracellular pathogens.

Cellular Immunity

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

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