Indicate whether each statement is true or false regarding primary and secondary responses to an antigen.1. a primary response occurs when b-lymphocytes are first activated by an antigen. 2. in a primary response, b-lymphocytes form plasma cells and memory cells. 3. a secondary response is slower than a primary response. 4. in a secondary response, memory cells form plasma cells and more memory cells.

Statement no 1 is true. A primary response occurs when an antigens invades the body for the first time. B cells and T cell are activated to generate a response.

Statement no 2 is true, the B cells form plasma cells and memory cells during a primary response.

Statement 3 is false. A secondary response is faster than the primary response. When a pathogen invades the body again, the immune system already has memory cells for this pathogen. These memory cells will generate a quick response.

Statement no 4 is true. During a secondary response, the plasma cells will make more plasma cells and will also make memory cells as the pathogen might invade again.

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