Which of the following prevent entry of pathogens into the human body?
(A) The skin and phagocytosis
(B) The skin and chemical barriers
(C) Inflammation response and phagocytosis
(D) Inflammation response and chemical barriers - HSC - SSCE Biology - Question 3 - 2009 - Paper 1
Question 3
Which of the following prevent entry of pathogens into the human body?
(A) The skin and phagocytosis
(B) The skin and chemical barriers
(C) Inflammation response ... show full transcript
Worked Solution & Example Answer:Which of the following prevent entry of pathogens into the human body?
(A) The skin and phagocytosis
(B) The skin and chemical barriers
(C) Inflammation response and phagocytosis
(D) Inflammation response and chemical barriers - HSC - SSCE Biology - Question 3 - 2009 - Paper 1
Step 1
The skin and phagocytosis
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Answer
Phagocytosis is a process where certain cells, such as macrophages, engulf and destroy pathogens. However, it is more of an immune response occurring after pathogens have entered the body, so this option is not solely about preventing entry.
Step 2
The skin and chemical barriers
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Answer
The skin acts as a physical barrier prohibiting the entry of pathogens, while chemical barriers (such as mucus and antimicrobial substances) also play a critical role in preventing pathogens from entering the body. This combination effectively prevents pathogen entry.
Step 3
Inflammation response and phagocytosis
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Answer
Inflammation is a reaction that occurs after pathogens enter the body. Phagocytosis is part of the immune response to destroy pathogens that have already entered. Therefore, neither of these options prevents initial entry.
Step 4
Inflammation response and chemical barriers
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Answer
Inflammation response helps combat pathogens already present, while chemical barriers prevent entry into the body. However, inflammation occurs after a pathogen has entered, making this option ineffective for preventing entry.
