How Can Normal Flora Be a Barrier to Entry

question 3

Multiple Choice

How can normal flora be a barrier to entry?

• A) They cause an inflammatory response that kills pathogenic bacteria upon contact.
• B) They phagocytize any pathogenic bacteria that attempt to infect.
• C) They use up nutrients and release wastes, preventing pathogenic bacteria from gaining a foothold.
• D) They release histamine, which causes blood vessels to become permeable.
• E) They activate the complement system, which punches holes in the invading pathogen.

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