What role do neutrophils play in inflammation?

• A. They promote tissue healing and repair.
• B. They are the first responders to the site of injury.
• C. They produce antibodies to fight infections.
• D. They assist in the formation of scar tissue.

Answer: (B)

Neutrophils are a type of white blood cell that play a crucial role in the body's immune response, particularly in the early stages of inflammation. When there is an injury or infection, neutrophils are among the first cells to arrive at the site. They are part of the innate immune system and are designed to respond quickly to acute inflammatory stimuli.

Their primary functions include phagocytosis, where they engulf and digest foreign pathogens and debris, and the release of various signaling molecules and enzymes that help to further recruit additional immune cells and sustain the inflammatory response. This initial response is vital for controlling infections and preventing the spread of pathogens.

The other options represent different aspects of inflammation and tissue healing, but they do not accurately specify the primary role of neutrophils. While neutrophils do indirectly promote tissue healing after the resolution of inflammation, their defining characteristic related to inflammation is that they are the first responders. Producing antibodies is a function associated with B cells, and while neutrophils can contribute to tissue repair, they do not directly assist in the formation of scar tissue, which is more typically the result of fibroblast activity and other cell types.