Biology Immunity ETEA 2023
PMDC Verified Question 71 of 99
The immune cells that clean up pus as a part of the healing process is:
A
Natural killer cell
B
Macrophages
C
Antibodies
D
Neutrophils
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Macrophages
Concept:

Pus consists of dead pathogens, tissue debris, and millions of dead neutrophils that fought the initial infection.

Formula:

None

Solution:

  • While neutrophils are the first responders and form the bulk of pus when they die, they do not clean it up.


  • Macrophages are large, long-lived phagocytes that arrive later at the infection site.


  • They act as the "garbage collectors" of the immune system, engulfing and digesting the dead neutrophils, debris, and remaining bacteria to facilitate tissue healing.


Why other options are incorrect:

  • Neutrophils: Their death creates the pus.


  • Antibodies: Molecules, not cells; they cannot phagocytose debris.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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