Check all the statements that are true for BOTH T cells and B cells.
1. The cells have a specific protein receptor in their membranes.
2. uses cells to defend against pathogens
3. regulates the production of plasma cells
4. when activated, make millions of clones of themselves
5. uses antibodies to defend against pathogens
6. can bind with free-floating antigens
7. form memory cells to provide protection against future attacks by the same
pathogen
8. responsible for regulating the immune system
9. produced in bone marrow
10. mature in the thymus