Occupational and Environmental Health: Recognizing and Preventing Disease and Injury - Multiple Choice Questions 2025 - Free Practice Questions and Study Guide

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How does the skin primarily prevent toxic substances from entering the body?

By secreting protective oils

By maintaining a high pH

By acting as a physical barrier

The skin stands as the first line of defense against harmful substances found in the environment. It forms a protective barrier around our body, keeping out potential toxins like bacteria, chemicals, and dirt. While the skin does secrete oils that also provide protection, this is not its primary role. Maintaining a high pH and metabolizing chemicals on contact are also not functions of the skin and do not contribute to preventing toxic substances from entering the body.

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By metabolizing chemicals on contact

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