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 please select the best answer from the choices provided.

Explanation:

Physical barriers in the body, like skin and mucous - membranes, work by preventing pathogens from entering the body. They can also trap pathogens when they first enter and flush them out. They don't typically destroy substances before entry, prevent reproduction inside the body (that's more of an immune - system function), or transport substances in the body for the purpose of preventing infection.

Answer:

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