lymphoid structures

Question 1

primary immune organs

Answer 1

bone marrow - immune cell production, B cell maturation

Thymus- T cell maturation

Question 2

secondary immune organs

Answer 2

spleen, lymph nodes, tonsils, Peters patches

allows immune cells to interact with antigen

Question 3

lymph node

Answer 3

a secondary lymphoid organ that has many afferents, 1 or more efferents.

Question 4

lymph node is encapsulated with ____

Answer 4

trabecular

Question 5

function of lymph nodes

Answer 5

nonspecific filtration by macrophages, circulation of B and T cells, and immune response activation

Question 6

lymph node is made of 3 parts

Answer 6

follicle, medulla, paracortex,

Question 7

follicle

Answer 7

site of b cell localization and proliferation, in outer cortex. primary follicles are dense and quiescent. secondary foibles hav pale central centers and are active

Question 8

medulla

Answer 8

consists of medullary cords (closely packed lymphocytes and plasma cells) and medullary sinuses. Medullary sinuses communicate with efferent lymphatic and contain reticular cells and macrophages

Question 9

paracortex

Answer 9

contains T cells

region of cortex between follicle and medulla. contains high endothelial venules through which T and B cells enter from blood. Not well developed in patients with digeorge syndrome.

Question 10

paracortex ____ in an extra cellular immune response

Answer 10

enlarges (ex EBV ad other viral infections -> paracortical hyperplasia -> lyphadenopathy)