The Complement System

question 63

Multiple Choice

The complement system

• A)includes a group of about 30 plasma proteins.
• B)induces a cascade of proteins that counteract invasion by coating the invading cells.
• C)attracts phagocytic leukocytes to attack invading cells.
• D)causes the lysis of the plasma membranes of invading cells.
• E)does all of these.

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