Question

Complement activation limits bacterial infections, but some bacteria mimic human cells to evade the actions of complement.

a. True.
b. False.

Answer 1

The statement is true. The complement system plays a crucial role in the immune response against pathogens, and antibodies attached to bacterial cells can activate complement activation. Some bacteria evade complement activation by mimicking human cells.

Step-by-step explanation:

The statement is true.

The complement system is a group of approximately 20 proteins in the blood that play a crucial role in the immune response against pathogens. When activated, the complement system forms a cascade of reactions that ultimately leads to the destruction of the pathogen. Antibodies attached to the surface of bacterial cells can activate the complement system, marking the bacteria for destruction.

However, some bacteria have evolved mechanisms to evade complement activation by mimicking human cells, which can help them avoid destruction by the complement system.