Which statement best describes inflammation in immunity?

• A. It recruits immune cells and increases blood flow to damaged tissue as a nonspecific response.
• B. It directly neutralizes pathogens by antibodies.
• C. It occurs only after adaptive response activation.
• D. It decreases pathogen growth without affecting cells.

Answer: (A)

Inflammation is the nonspecific innate defense that kicks in at tissue injury or infection. It involves widening of blood vessels and increased vascular permeability, which bring immune cells like neutrophils and macrophages to the damaged area. This rapid recruitment helps contain pathogens, clear debris, and begin tissue repair without needing prior exposure or antibodies. Antibodies are part of the adaptive response and act later, not during the initial inflammatory phase. Inflammation can occur quickly and independently of the adaptive system, and its hallmark is the cellular and vascular changes at the site, reflecting a general, nonspecific defense.