PSI Texas State Board Nail Tech practice exam

Which of the following statements about skin is correct?

1. Skin is primarily composed of muscle.

2. Skin absorbs toxins easily from the environment.

3. Skin provides insulation for the body.

4. Skin has no role in vitamin synthesis.

The correct answer is: Skin provides insulation for the body.

The correct statement is that skin provides insulation for the body. The skin contains layers of fat and connective tissue that help to regulate body temperature by trapping heat and preventing excessive heat loss. This insulating function is crucial for maintaining the body’s core temperature, especially in colder environments. Additionally, the skin plays a role in protecting underlying tissues and organs from extreme temperature variations, contributing to overall thermal regulation. In contrast, skin is not primarily composed of muscle, as it consists mainly of epithelial cells, dermis, and subcutaneous tissue. While the skin does provide some barrier functions, it does not efficiently absorb toxins in the way that the option suggests, as it primarily acts as a protective barrier against harmful substances. Furthermore, skin is involved in the synthesis of vitamin D upon exposure to sunlight, highlighting its critical role in this important physiological process.