Immunity: explain question

A patient receives a kidney transplant from an unrelated donor. The transplanted kidney carries cell surface antigens that are different from the patient's own antigens. Explain how the immune system distinguishes between self and non-self antigens, and describe the sequence of events during the primary immune response against the transplanted kidney. In your answer, include the roles of macrophages, T-helper cells, T-killer cells, B-lymphocytes, plasma cells, and memory cells, and explain how memory cells contribute to long-term immunity.