The white blood cell illustrated (mark all that apply) (A) is number three in WBC frequency (B) is phagocytic / or will become phagocytic (C) releases histamine (D) is the precursor cell to a plasma cell (E) is classified as a 'granulocyte'

1. Compared to innate immunity, adaptive immunity (A) has a response time of minutes to hours. (B) is only specific to a few types of antigens.  (C) becomes more rapid and efficient with each subsequent exposure.  (D) All of these are correct.    2. The white pulp of the ____ forms the periarteriolar lymphoid sheath (PALS) around arterioles. Closely associated with the PALS are lymphoid follicles, primarily composed of ____ in their germinal centers.  (A) spleen; B cells (B) thymus; T cells (C) spleen; macrophages (D) thymus; neutrophils

_______ are substances that provoke a specific immune response which is so discriminating that only a single molecular fragment, called an _______, interacts with the lymphocyte’s receptor.   a) Antigens; epitope b) Epitopes; immunogen c) Immunogens; fragment d) Allergens; allograft

A 23 year old woman has a boil on the hand from which a gram-positive bacteria was isolated. What role does complement play in the resolution of this infection? (a) Lyse the bacteria (b) attracts neutrophils  (c) stimulates T cells (d) promotes immunoglobulin class switch