Cell cycle and immune response

Question 1

helper T cells

Answer 1

release chemical signals called cytokines which stimulate phagocytes and also activate specific B cells which then divide

Question 2

cytotoxic (killer) T cells

Answer 2

•Secretes toxin called perforin - makes holes in cell surface membrane of cancerous/infected cell
•becomes freely permeable
•cell dies

Question 3

antibody

Answer 3

cloned/identical plasma B cells (same tertiary structure)