The EDAIC MCQs with answers and simplified explanations. FREE UPLOADS BY WWW.TARGETEDAIC.COM (31)

The section, ‘EDAIC MCQs’ with answers and simplified explanations, covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.

Question: All of the following are components of innate immunity

1. Skin
2. Stomach acid
3. Plasma cells
4. NK cells
5. Cytokines

Answers:

1. true
2. true
3. false
4. true
5. true

Explanation:

The innate immune system is the non-specific and first line of defence that is present from birth. Essential components include

1. Physical and chemical barriers to pathogen entry
   1. Skin
   2. Mucosal barrier
   3. Acidic pH in stomach
   4. Lactic acid
   5. Lysozyme
   6. Body temperature
2. Cellular elements
   1. Polymorphonuclear cells (neutrophil, basophil, eosinophil, mast cells)
   2. Dendritic cells
   3. Macrophages
   4. Natural killer cells
   5. Gamma-delta T cells

Direct cell damage by phagocytosis, lysis and apoptosis. The immune response involves antigen presentation, cytokines, leukotrienes and other inflammatory mediators to incur damage on the foreign pathogen and to invoke the more specific cellular and humoral immune response.

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The ‘EDAIC MCQs with answers and simplified explanations’ section covers a different topic each day with the intent that candidates can prepare one small topic each day, making steady progress in their exam preparation.