Explanation should include

first line of defense against infection
- components and general function of natural immunity (e.g., skin, mucus membranes, secretions)
second line of defense
- granulocytes/phagocytes
- five steps and general activities in phagocytosis
- inflammation
- comparison of the cellular and humoral components of innate immunity (acute phase reactants, C-reactive protein [CRP])
third line of defense (adaptive response)
- function of adaptive immunity
- types of lymphocytes and the function of each type
- definitions and characteristics of antigen and antibody
- five classes of antibodies.

Process/Skill Questions:

How does a lymphocyte function?
What is adaptive or acquired immunity?
What characteristic in neutrophils demonstrates that they have performed phagocytosis?