Which of the following types of cells do not reproduce, and if damaged by injury or disease, are lost forever? answers: skin cells. red blood cells. muscle cells. brain cells.

Which of the following are not matched correctly? cd8+: directly destroy infected or cancerous cells t reg cell: reduce the adaptive response once threat passes t l: activate cellular branch (cytotoxic t cells, macrophages, nk cells) t 2: stimulate b cells to make antibodies t (cd4+): mhc i