What are MHCs also known as?

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Multiple Choice

What are MHCs also known as?

MHCs are Major histocompatibility complexes, cell-surface proteins that present peptide fragments to T cells to help the immune system distinguish self from non-self. This presentation is essential for activating T cells and for tissue compatibility in transplantation. There are two main classes: Class I MHC molecules are found on most nucleated cells and present to CD8+ cytotoxic T cells, while Class II MHC molecules are on antigen-presenting cells and present to CD4+ helper T cells. The other options aren’t correct terms for MHCs: graft rejection involves responses to non-self MHCs but isn’t the name of the complex; antibody production markers refer to B-cell activity; T cell receptors are the receptors that recognize antigen-MHC complexes, not the MHC molecules themselves.

MHCs are Major histocompatibility complexes, cell-surface proteins that present peptide fragments to T cells to help the immune system distinguish self from non-self. This presentation is essential for activating T cells and for tissue compatibility in transplantation. There are two main classes: Class I MHC molecules are found on most nucleated cells and present to CD8+ cytotoxic T cells, while Class II MHC molecules are on antigen-presenting cells and present to CD4+ helper T cells. The other options aren’t correct terms for MHCs: graft rejection involves responses to non-self MHCs but isn’t the name of the complex; antibody production markers refer to B-cell activity; T cell receptors are the receptors that recognize antigen-MHC complexes, not the MHC molecules themselves.

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