Which of the following immune responses can potentially lead to tissue death and

Question

Which of the following immune responses can potentially lead to tissue death and possibly be fatal? A) acute inflammation B) chronic inflammation C) dolor D) rubor What type of cell stimulates inflammatory vasodilation by secreting histamine? A) Fibroblasts B) B cells C) Mast cells D) Cytotoxic T cells Which of the following is a chemical that is released by damaged cells that can trigger inflammation? A) Leukotrienes B) Prostaglandins C) Histamine D) All of the above Phagocytic cells that have phagocytized bacteria, particularly macrophages, produce what chemical that signals the hypothalamus of the brain to reset the body's thermostat triggering fever? A. Interleukin 1 B. Histamine C. Leukotriene D. Interferon

Explanation / Answer

21) B chronic inflamation

Chronic inflamation is a long term inflamation .It is an auto immune response generated to a self pathogen.the immune system attacks healthy tissue mistaking it for harmfulpathogens leading to tissue dammage and eventually death of tissue.

22) C Mast cells

Mast cells and b cells produce Histamine as a part of immune response to a pathogen.histamine increases the permeability of capilaries and helps pathogens to engage in tissues.histamines are released when allergen binds to igE antibodies .

23) D All the above

Histamines and prostaglandins inturn trigger leucotrines as a part of inflamatory response caused by allergens.These chemicals trigger vasodialation and increases vascular permeability.

24) D Interferons

Interferons are released by host cells in respose to pathogens.hypothermea is thermoregulatory response to systemic inflamation .

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