Title

Recognize antigens on pathogens and attack them directly (correct)

None of the above

Produce special chemicals called antibodies

Regulate the activity of other cells of the immune system

Recognize antigens on pathogens and attack them directly

Produce special chemicals called antibodies (correct)

None of the above

Regulate the activity of other cells of the immune system

In the lungs

In the liver

In the heart

In the blood or lymph nodes (correct)