Question

33. A complement component which is strongly chemotactic for neutrophils is:                             &nbsp

33. A complement component which is strongly chemotactic for neutrophils is:                                        

A. C9           

B. C5a          

C. C3           

D. C3b              

E. C5b

34. Acute inflammation can be initiated by:                                                                                                                                                                                    

A. Mast cell activation                                            

B. Influx of neutrophils                                                                         

C. An increase in vascular permeability             

D. C3                                                                                               E. Lysozyme   

  1. Several of the complement components are:                                                                                                                                         A. Glycolipids    B. Cytokines                           C. Enzymes                                                                                                         D. Hormones                        E. Antibodies

36. The classical and alternative pathways meet at complement component:                                                                                       A. C4            B. C4b             C. Factor D    D. C5                 E. C3

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Answer #1

33) C3a is also chemotactic but at some extent and to a greater extent C5a is chemotactic. So the answer here will be C5a hence option b is your answer.

34) acute inflammation is initiated with first vascular changes and after that immune cell extravasation. After the vascular changes the immune cell extravasation takes place in this the first to initiate is entry of neutrophils. So the answer here wil be Influx of neutrophils. Option B is the answer.

35) I will say here Cytokines, Antibodies and Enzymes as the answer here. Because these are involved in the complement system. Antibodies trigger the pathway where protease enzyme is activated and cleave specific proteins to release Cytokines.

36) The classical and alternate pathway meet at complement C3.

Hope this helps, Good luck!!!

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