Cilia prevent the entry of pathogens into the human body by
(A) providing a protective body covering - HSC - SSCE Biology - Question 8 - 2010 - Paper 1
Question 8
Cilia prevent the entry of pathogens into the human body by
(A) providing a protective body covering.
(B) producing secretions toxic to pathogens.
(C) moving trap... show full transcript
Worked Solution & Example Answer:Cilia prevent the entry of pathogens into the human body by
(A) providing a protective body covering - HSC - SSCE Biology - Question 8 - 2010 - Paper 1
Step 1
Identify the Function of Cilia
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Answer
Cilia are hair-like structures that line the respiratory tract and other areas of the body. Their primary function is to trap and move particles, including pathogens, out of the body.
Step 2
Analyze Each Option
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Answer
Consider the following:
Option A refers to a protective body covering, which is inaccurate for cilia.
Option B discusses producing secretions toxic to pathogens, which is not a primary role of cilia.
Option C mentions moving trapped pathogens to the mouth; while cilia do move trapped particles, this does not clearly define their role in preventing entry.
Option D involves increasing blood circulation to the infected area, which is unrelated to cilia's function.
Step 3
Correct Answer
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Answer
Based on the analysis, the best answer is (D) as it acknowledges the role of cilia in enhancing clearance, although technically, none of the options directly address the prevention of pathogen entry through mechanical action.
