Question

In order for a physical barrier to be effective in preventing infection, the barrier must __________. A. prevent the substance from entering the body, trap the substance when it first enters the body, or flush the substance out of the body B. destroy the substance before it enters the body, prevent the substance from reproducing, or flush the substance out of the body C. trap the substance in the body, remove the substance from the body, or prevent the substance from reproducing D. flush the substance from the body, transport the substance in the body, or destroy the substance in the body

Answer 1

Option B is the answer

Answer 2

In order for a physical barrier to be effective in preventing infection, the barrier must prevent the substance from entering the body, trap the substance when it first enters the body or flushes the substance out of the body.  

Option A.

Explanation:  

• Diseases are caused in living organisms when pathogens from the environment enter the physical body and cause disruption in the regular functions by reproducing and taking over the actions of organs.  
• This creates the need for a physical barrier that would help in preventing the entrance, and on occasion, trapping a foreign substance enters and flushing out of the body at the same time.  
• This would help in preventing the spread of communicable ailments.  

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