Question

guys pls help me in these questions ... tomorrow is my exam in 11th and 13th question...

Answer 1

11 A. Reason for first question is that there are no specific antibodies that are produced for that vaccine in the baby,
antibodies are freshly prepared for specific antigens in vaccine.But for production of antibodies it take time of minimum 3 months,hence there are no antibodies during that period.
B.Response is different because initial production is less, when a specific antigen are reappears in baby which caacades further production and hence their levels increases finally.
C.same as above
D.For testing the activity of vaccine and antibodies.

13.A.functions of Lymphatic nodes:
*they function as lymph checkers and they kills foreign bodies.
Lymph vessels :: carries the lymph to lymph nodes and also drains into venous blood.
B.when bacteria enters into our body macrophages engulf them and kills and releases remnant particals as antigens, which were then identified by lymphocytes and thus lymphocytes produces antibodies specific for those antigens.Finally more number of macrophages can identify the bacteriophage/bacteria and kills them.