28. What cell secretes histamine, serotonin, and heparin? a. mast cell b. fibrob

Question

28. What cell secretes histamine, serotonin, and heparin? a. mast cell b. fibroblast e. platelet d. CD4+ cell 29. C5a is important to: a. antibody secretion b. recruitment of inflammatory cells c. blood coagulation d. walling off infection 30. Which of the following chemicals is critical to the formation of the platelet plug? a. Factor VII b. Factor XII c. Thromboxane d. Histamine e. None of the above macrophage? 31. Which of the following is a pro-inflammatory secretion from the a. histamine b. IL-2 c, TNF-? d. prothrombin 32. Which of the following is an Antigen Presenting Cell? a. mast cell b. macrophage c. eosinophil d. neutrophil 33. What is the pattern of cell death associated with bacterial lysis and ischemic conditions i diabetic? a. gangrenous b. fibrinoid c. amyloid d. caseous 34. Which of the following is known as endogenous pyrogen? a. interleukin 1 b. interleukin 2 c. histamine d. plasmin

Explanation / Answer

Ans-28- Mast cells secrete all of the three above given chemical compounds. they are primarily secreted by IgE- primed mast cells. works in deglutination of blood cells inside blood vessels

Ans29-C5a is also an effective chemoattracting agent initiating accumulation of complement and phagocytic cells at sites of infection or recruitment of antigen-presenting cells to lymph nodes hence causing walling of infection.

hence the correct option is option (d)

Ans-30- Factor VII is responsible for formation of platelet plug whose initial stage is known as formation of coagluation cascade. It is an enzyme of serine protein class. It is the initiator for process of coagluation.

Ans 31- TNF-Alpha is a cytokine produces cheifly by macrophages primarily responsible for pro inflammatory results. main function of it is regulation of immune cells. and is able to induce apoptotic cell death.

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