Contrary to the earlier belief that the brain and immune system ...

[nelaaney]

Contrary to the earlier belief that the brain and immune system operate independently of each other, scientists accidentally discovered a link working with rats in a(n)
 
  a. classical conditioning paradigm.
  b. injection trial experiment.
 c. rheumatoid arthritis study.
 d. experimental HIV trial.

Question 2

The immune system is weakened in AIDS patients because the human immunodeficiency virus directly attacks the lymphocytes called
 
  a. killer T cells.
 b. T4 (helper) cells.
 c. suppressor T cells.
  d. B cells.

[izzat]

Answer to Question 1

a

Answer to Question 2

b

[nelaaney]

Thanks for the timely response, appreciate it

[Hdosisshsbshs]

Wow, this really help