D. 2) Lymphoid Organs

Question 1

primary lmyphoid organs

Answer 1

bone marrow and thymus. hematopoiesis produces lymphocytes that must mature in a primary lmyphoid organ to become immunocompetent

Question 2

B cells mature in the

Answer 2

bone marrow

Question 3

T cells mature in

Answer 3

leave the bone marrow and mature in the thymus

Question 4

secondary lymphoid organs include

Answer 4

lymph nodes, spleen, and mucosa-associated lymphoid tissue (MALT)

Question 5

MALT includes

Answer 5

Peyers’s patches, tonsils and appendix

Question 6

fn of MALT organs

Answer 6

to trap antigen. these organs have lots of B and T cells that can produce an adaptive immune response to eliminate the anitigen

Question 7

the lymph nodes trap antigens from the ___ and the spleen traps antigens from the ____

Answer 7

lymph and blood

Question 8

where does MALT encounter antigens

Answer 8

on mucosal surfaces in the lungs, digestive tract and urogenital systems

Question 9

location and structure microfold or M cells

Answer 9

in the digestive tract, Peyer’s patches include epithelial cells called microfold. M cells do not have microvilli. the other side has a large pocket filled with B and T cells, dendritic cells and macrophages

Question 10

fn of M cells (transcytosis)

Answer 10

take up antigen from the intestinal lumen by endocytosis and then release it into the pocket. the immune cells will have an adaptive immune response to the anitigen