A sharp, pointed object punctures the skin on the bottom of your foot resulting in a wound that does not bleed freely. You would most likely find antigens from any microbes entering the wound in the

The invading microbe or pathogen is called an antigen. It is regarded as a threat by the immune system and is capable of evoking an immune response. Antigens are proteins that are found on the surface of the pathogen.

Which cells allow antigen entry?

T and B cells differ in one basic way: whereas T cells bind antigens that have been outlined and embedded in MHC molecules by APCs, B cells function as APCs that bind entire antigens that have not been processed.

Thus, the surface, invading microbe or pathogen is called an antigen. It is regarded as a threat by the immune system and is capable of evoking an immune response.

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