[Campbell Biology P.1004] Based on the description of the local inflammatory response and the... | Practice Question

Based on the description of the local inflammatory response and the prompt about splinters Figure 43.5 , which conclusion can be drawn regarding the signaling molecules mediating this response?

  • A: They are long-lived, as the body requires continuous signaling to ensure complete wound healing over an extended period.
  • B: They are short-lived, allowing the inflammatory response to be tightly regulated and cease once the threat is resolved, preventing chronic inflammation.
  • C: They are transported throughout the bloodstream to trigger a systemic immune response, regardless of the injury's localization.
  • D: Their activity is independent of cellular interaction, acting solely via passive diffusion to reach target cells.

Explanation

A splinter causes a local inflammatory response that typically resolves within a few days, indicating that the signaling molecules responsible for the initial acute phase are short-lived. This allows the response to be tightly regulated and to cease once the pathogen or irritant is removed, preventing prolonged or chronic inflammation which could be damaging to the tissue.