Answer:
Helper T-cells stimulate B-cells to make antibodies and help killer cells develop. Killer T-cells directly kill cells that have already been infected by a foreign invader. T-cells also use cytokines as messenger molecules to send chemical instructions to the rest of the immune system to ramp up its response.
11.B 12.A 13.C. 14.B 15.D 16. False. 17.True 18. True 19.True.
Emotional- working on arguing less with my parents
social- try to go out with friends more
physical- work out at least twice a week
academic- all A’s and B’s
Answer: It reduces the ability of the circulatory system to transport oxygen
Explanation:
