Short answerModerate1 mark
6(iv)
Mention one function for each of the following:
Neutrophils
Topic: Neutrophils
Previous-year question practice database
Answer
Exam answer
NEUTROPHILS destroy bacteria and other foreign particles by PHAGOCYTOSIS — they engulf the germs and digest them with their enzymes.
Explanation
Neutrophils fight by PHYSICAL means, swallowing the enemy whole — which contrasts neatly with the lymphocytes in part (a), which fight chemically with antibodies. The examiner has asked about both in one question precisely to test that distinction.
Neutrophils are the most numerous white cells and the FIRST to reach a site of infection. They squeeze out through the capillary walls by DIAPEDESIS to get there.
The PUS at an infected wound is largely dead neutrophils together with the bacteria they engulfed.
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