of the Your immme 19 Which of the a 12 4 5 b 2346 6 13 56 d
Solution
17. Option C. Absorption of lipids in the small intestine,Body fluid balance and body defence mechanism and immunity.
Lymphatic system has three main functions:
1. Returning of interstitial fluid to the blood.
2. Absorption of fatty acids and lipids in the small intestine through mucous membrane and villi lining the membrane.
3. Lymphatic system provide defence mechanism and immunity to the body through lymphocytes.
18. Option B.The immune system produce \'memory cells\' that will persisy for many decades.
When a chicken pox virus enter the body macrophages produce T helper cells. T cells activate B- cells with the help of interleukins. Some B cells turn into plasma cells and memory cells. Plasma cells removes the virus while memory cells remain in the immune system preventing chicken pox virus to enter again.
19. Option C.
External barriers of First line defence include Skin and mucous membrane , gastric acid (H+) , acidic sweat, lacrymal lysozyme.
Phagocytosis and complement proteins are senond line of defence.
20. Option b. IgM
IgM is most effective in agglutination reaction due to its high specificity to antigens.
21. Option 6.
Cardinal sign of inflammatory response include : pain, redness, increased temperature, swelling/ puffing expulsion of exudate. When a injury occurs in the body blood vessels get dilated making the surrounding area red.

