4 Which innate defense cell would a pathogen likely encounter in your skin? a.na

Question

4 Which innate defense cell would a pathogen likely encounter in your skin? a.natural killer cell b.eosinophil c.dendritic cell d.B-cell When a cell is infected by a virus, it can signal other cells to ramp up their defenses by releasing a. complement proteins b. cosinophils c. interferon proteins d.Toll-like receptors 6 Which cell would NOT be involved in the inflammatory response? a.natural killer cell b.mast cell c.macrophage d.ncutrophil 7 Septic shock a.is fatal in one out of three cases b.is caused by over-production of natural killer cells c.is only caused by large parasites d.results from an out of control adaptive immune system 8 One different between T cells and B cells is a. that T cells have Y-shaped antigen receptors while B cells have straight antigen receptors b.that T cells are involved in the innate immune system while B cells are involved in the adaptive immun stem. c.that T cells attack viruses while B cells attack prokaryotes. d. that T cells mature in the thymus and B cells mature in bone marrow.

Explanation / Answer

4. c. Dendritic cell. Dendritic cells are specialized antigen presenting cells (APCs) that are abundant in skin tissues. During movement from skin to draining lymph node, they are able to recognize pathogenic epitope and present to naive T-cells. Other listed cells are not abundant in skin.

5. c. Interferon proteins.

6. a. Natural killer cell.

7. a. is fatal in one out of three cases. Mortality rate is 25-50%.

8. d. that T cells mature in the thymus and B cells mature in bone marrow.

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