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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
Identify the Components of the Immune System
Answer
To determine which options prevent pathogen entry, we need to recognize the components involved in the immune system. The skin acts as a physical barrier, and chemical barriers include secretions like mucus and enzymes that inhibit pathogen entry.
Step 2
Evaluate Each Option
Answer
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The skin and phagocytosis: Phagocytosis is an immune response that occurs after pathogens have entered the body, thus not primarily a preventative measure.
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The skin and chemical barriers: This option involves both the skin and the biochemical components that provide defense against pathogens, making it a suitable answer.
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Inflammation response and phagocytosis: Similar to the first option, inflammation and phagocytosis occur after the entry of pathogens, failing to prevent their initial entry.
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Inflammation response and chemical barriers: This option includes the biochemical responses that can occur after pathogen entry but does not include preventative measures like skin.
Step 3