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When foreign substances invade the body's cells and cause harm, the immune system responds by producing specific proteins that bind to these invaders and neutralize them. These proteins are called antibodies.

1. Foreign substances invade the body's cells and cause harm.
2. The immune system produces proteins called antibodies.
3. Antibodies bind to invaders and neutralize them by forming inactive complexes.
4. None of the above.

Correct answer: The immune system produces proteins called antibodies.

Solution

The correct statement is that antibodies, being proteins, are synthesized in the body to combat antigens. This aligns with the immune response mechanism.

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