Boy in the plastic bubble

1. Boy in the plastic bubble

6. The process of blood clotting Blood vessels damaged Presence of blood platelets, Calcium ions, vitamin K, several blood clotting factors Soluble fibrinogen insoluble fibrinogen form a meshwork, and seal off the catching blood cells wound

9. White blood cells Physical barrier e.g. skin pathogens Chemical barrier e.g. gastric juice

15. Latent period

18. Antigen presenting cells T -helper cell lymphokines T -helper cell B cell T-killer cell T-memory cell T-suppressor cell Plasma cell

26. Anti Rh antibody produced in mother Rh-ve mother Contact of blood at birth Her 1st Rh +ve child Her subsequent child will be acted on by the antibody

27. 1. If the mother is Rh-ve and her first child is Rh+ve. Would the mother have problem ? 2. If the mother is Rh+ve and her first child is Rh-ve. I) Would the mother have problem ? II) Would her subsequent children have problem ?

30. Compare this with the blue line depicting the mortality from infections since 1900. In the first 4-5 decades of the use of antimicrobial agents, there was a dramatic fall in the mortality from infections but since the mid-80's deaths due to resistant infections is slowly increasing.

32. AZT

35. (A) (B)

38. PABA - a substrate required for the formation of bacterial cell wall A sulphonamide

39. ( protonsil ) ( PABA ) The pathogenic bacteria unable to multiply