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.

Question

Quizplus · Accepted Answer

The complement system includes a group of about 30 plasma proteins and induces a cascade of proteins that counteract invasion by coating the invading cells. This process also attracts phagocytic leukocytes to attack the invading cells and can cause the lysis of the plasma membranes of invading cells. Therefore, all of these options are correct.

The Complement System