IMMUNOLOGY

IMMUNOGLOBULINS

CLASSICAL ALTERNATE AND LECTIN PATHWAYS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Function of MIRL
A
Adhesion and increased activity of phagocytic cell
B
Prevents insertion of C9 into cell membrane
C
Cofactor for factor I cleavage of C3b and C4b
D
Dissociates C2b or Bb from binding sites
Explanation: 

Detailed explanation-1: -The complement membrane attack complex (MAC) is classically known as a cytolytic effector of innate and adaptive immunity that forms pores in the plasma membrane of pathogens or targeted cells, leading to osmolysis.

Detailed explanation-2: -In response to complement activation, the membrane attack complex (MAC) assembles from fluid-phase proteins to form pores in lipid bilayers. MAC directly lyses pathogens by a ‘multi-hit’ mechanism; however, sublytic MAC pores on host cells activate signalling pathways.

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