IMMUNOGLOBULINS
CLASSICAL ALTERNATE AND LECTIN PATHWAYS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Most of the proteins of the complement system are inactive enzyme precursors, or zymogens, that are converted to active enzymes in a very precise order. One such means of activation is the classical pathway, which is triggered by antigen-antibody combination and involves eight of the proteins.
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First statement is true; Second statement is false
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First statement is false; Second statement is true
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Both statements are true
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Both statements are false
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Explanation:
Detailed explanation-1: -Complement is a system of plasma proteins that can be activated directly by pathogens or indirectly by pathogen-bound antibody, leading to a cascade of reactions that occurs on the surface of pathogens and generates active components with various effector functions.
Detailed explanation-2: -Complement operates in plasma, in tissues, or within cells (2). Complement proteins collaborate as a cascade to opsonize pathogens and induce a series of inflammatory responses helping immune cells to fight infection and maintain homeostasis.
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