Pathology Exam 2 Questions and Answers 100% Verified for Exam Guide

• What is part of both the lymphoid and immune systems? o Thymus o Spleen o Lymph nodes o Lymph nodules o MALT • The lymphoid system (lymphatic system) is categorized into: primary and secondary lymphoid organs • What are the primary lymphoid organs? thymus, bone marrow, bursa of Fabricius in birds • What are the functions of the primary lymphoid organs? sites where B and T cells proliferate, differentiate and mature • What are the secondary lymphoid organs? spleen, lymph nodes, lymph nodules, MALT • What are the functions of the secondary lymphoid organs? immune responses to antigens, production of antibody, cell-mediated immune reactions • What is the portal of entry for the thymus? hematogenous • What is the portal of entry for the spleen? o hematogenous o direct penetraction • Whaat is the portal of entry for the lymph node? o hematogenous o afferent lymphatic vessels • What is the portal of entry for the MALT? o hematogenous o migrating macrophages o dendritic cells o M cells (Peyer's patches) • Infectious agents typically enter the lymph node by direct penetration FALSE 1 multiple choice option • Afferent lymphatic entry is the usual route of entry of infectious agents into MALT FALSE 1 multiple choice option • Johne's disease causes _____ atrophy of fat and _____ enteritis. o serous atrophy of fat o granulomatous enteritis • What species does Johne's disease usually affect? domestic and wild ruminants (rarely pigs and horses) • What bacteria causes Johne's disease? Mycobacterium avium subspecies paratuberculosis • Granulomatous enteritis due to Johne's disease affects what organs? ileum, cecum, proximal colon • How does Johne's disease affect the lymph nodes? o lymphangitis o lymphadenitis of regional lymph nodes • How do animals get Johne's disease