4. Short Answer (8 marks) A) Explain what happens to the following 2 B cells and 1 helper T cell: (provide your reasons)
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4. Short Answer (8 marks) A) Explain what happens to the following 2 B cells and 1 helper T cell: (provide your reasons)
4. Short Answer (8 marks) A) Explain what happens to the following 2 B cells and 1 helper T cell: (provide your reasons) B cell X has a matching receptor for Antigen B B cell Y has a matching receptor for Antigen A A helper T cell recognizes Antigen C. A pathogen invades a person and it expresses antigen C and D. B) The immune system needs to have a balance between positive feedback and negative feedback mechanisms to make it work successfully. Explain why this must be the case use examples
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