What role do neutrophils play in the immune system?

Neutrophils are a type of white blood cell that play a crucial role in the innate immune response, serving as one of the first lines of defense against infections. When tissue is damaged or when pathogens such as bacteria invade the body, neutrophils are among the first responders that arrive at the site of infection. They are highly effective at identifying and engulfing pathogens through a process called phagocytosis, as well as releasing enzymes and reactive oxygen species to destroy the invaders.

Their rapid response to infection is critical because it helps contain the spread of pathogens and initiates inflammation, which is essential for activating other aspects of the immune system. Neutrophils can quickly accumulate at sites of infection or injury and play a key part in the acute inflammatory response, contributing to both the removal of pathogens and the overall healing process.

This role of neutrophils sets them apart from the other options, which involve mechanisms that pertain to different aspects of the immune system. The production of antibodies is primarily a function of B cells, while lymph fluid drainage is associated with the lymphatic system rather than immune cells like neutrophils. Enhancing the activity of natural killer cells falls more under the purview of other immune cells that modulate immune responses