Question

the macrophages call the ______ to help contain the infection. antigen neutrophils red blood cells

Explanation:

To solve this, we analyze each option:

• Antigen: A foreign substance that triggers an immune response, not a cell called by macrophages to contain infection.
• Neutrophils: A type of white blood cell. Macrophages (part of the immune system) can recruit neutrophils to help fight infections by phagocytosing pathogens.
• Red blood cells: Primarily carry oxygen, not involved in containing infections.

So the correct answer is neutrophils.

Answer:

B. neutrophils