T helper cells

Question 1

involved in the cell-mediated response and delayed (type IV) hypersensitivity
secrete IFN-gamma, IL-2, IL-3

Answer 1

Th1

Question 2

involved in mediating humoral (antibody) immunity
e.g. stimulating production of IgE in asthma
secrete IL-4, IL-5, IL-6, IL-10, IL-13

Answer 2

Th2