Problem: Name the branches of adaptive immunity and compare adaptive to innate immunity. • Compare and contrast T and B cells including the role of memory cells • Compare and contrast T helper versus T cytotoxic cells • Discuss the structural and functional features of each of the following antibody classes: IgG, IgA, IgM & IgE. • Describe immunological memory and compare it to a primary response. • Name and describe the four categories of Humoral immunity (Natural/Artificial-Active/Passive).