Which Is the Best Explanation of How Complement-A Group of About

question 78

Multiple Choice

Which is the best explanation of how complement-a group of about 20 inactive enzymes in the plasma and on cell surfaces-is activated and produces cytolysis?

• A) Complement is "turned on" by the presence of bacteria.
• B) Complement is activated by antibodies to "drill a hole" into foreign cells, thus causing cytolysis.
• C) Complement causes vasoconstriction and inhibits phagocytosis.
• D) Both A and B are correct.

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