Strains often occur as a result of lack of stretching before and after strenuous activity. Strains are an injury to a and can be a full tear that requires surgery or simply a slight strain that requires rest. A. blood vessel
B. heart
C. ligament
D. tendon

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