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Diapedesis...

Diapedesis

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Diapedesis is the amoeboid movement shown by leucocytes due to which they can squeeze out of blood capilliaries.
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Which of the following statements are correct for innate immunity? (I). Bacteria enter through a break in the skin. (II). Resident phagocytic cells engulf the bacteria (III). B-cells are stimulated to produce specific antibodies. (IV). Diapedesis allows new phagocytic leukocytes to invade the infected area. Codes

Match the column -I with column-II and select the correct option from the codes given below : {:("METHOD",,"MODE OF ACTION"),("a WBC", i,"Cardiac disc"),("b Adipose tissue ",ii," Protects and support neurons"),("c Communication junctions",iii,"Diapedesis"),("d Neuroglia",iv,"Store fats"):}

Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion (c) If the assertion is true but the reason is false (d) If both the assertion and reason are false (e) If the assertion is false but reason is true Assertion : WBCs accumulate at the site of wounds by diapedesis. Reason : It is squeezing of leucocytes from the endothelium.