1) Which of the following best describes what causes plasma cells to form during a humoral immune response?

AMemory B cells signal phagocytes to attack infected cells and divide, producing plasma cells.

BThe antibodies on the surface of B cells bind to antigens, and the B cells grow and divide, producing plasma cells.

CThe antigens on the surface of a pathogen attack healthy cells, and the resulting inflammation signals helper T cells to divide, producing plasma cells.

DMemory T cells recognize antigens and signal T lymphocytes to divide, producing plasma cells

2) Damage to which of the following structures would be most likely to result in an increase in mutations in a man's sperm cells?

AEpididymis

BTestes

CUrethra

DScrotum