Kaplan Nursing Entrance Practice Exam

Which function does the skin perform to protect the body?

1. Secretes hormones

2. Regulates blood pressure

3. Protects from microbial invasion

4. Stores fat

The correct answer is: Protects from microbial invasion

The skin plays a crucial role in protecting the body, and one of its primary functions is to act as a barrier against microbial invasion. The outermost layer of skin, known as the epidermis, provides a physical barrier that prevents pathogens, such as bacteria and viruses, from penetrating deeper layers or entering the bloodstream. Additionally, the skin contains antimicrobial peptides and other substances that help to neutralize and inhibit the growth of harmful microorganisms. This protective function is essential for maintaining overall health and preventing infections. While the skin has several other functions, such as participating in fat storage, hormone secretion, and influencing blood pressure through the regulation of blood flow and temperature, these are not its primary roles in providing protection against external threats. The focus on microbial invasion underscores the skin's vital role as the first line of defense in the immune system.