In the sequence of steps in the acquired immune response, what step directly follows recognition?

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Multiple Choice

In the sequence of steps in the acquired immune response, what step directly follows recognition?

Explanation:
After the immune cell recognizes its antigen, the immediate next step is processing. Antigen-presenting cells take up the antigen and break it down into peptide fragments, then load those fragments onto MHC molecules for presentation. This processing creates the peptide-MHC complexes that T cells need to see in order to become activated. Activation, proliferation, and the eventual immune response follow once the peptide-MHC presentation and necessary co-stimulatory signals occur. So processing directly bridges recognition and activation, which is why it’s the best choice.

After the immune cell recognizes its antigen, the immediate next step is processing. Antigen-presenting cells take up the antigen and break it down into peptide fragments, then load those fragments onto MHC molecules for presentation. This processing creates the peptide-MHC complexes that T cells need to see in order to become activated. Activation, proliferation, and the eventual immune response follow once the peptide-MHC presentation and necessary co-stimulatory signals occur. So processing directly bridges recognition and activation, which is why it’s the best choice.

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