Oregon Esthetician State Board

Which of the following is NOT one of the primary functions of the skin?

1. Sensation

2. Absorption

3. Respiration

4. Secretion

The correct answer is: Respiration

The primary functions of the skin include sensation, absorption, and secretion, all of which play significant roles in how the skin interacts with the environment and maintains homeostasis. Sensation allows the body to perceive external stimuli, such as touch, temperature, and pain, which is crucial for protection and awareness. Absorption refers to the skin's ability to take in certain substances, such as moisture and specific topical products. Secretion involves the release of oils and sweat from glands, which helps to protect the skin and regulate temperature. However, respiration is not considered one of the primary functions of the skin. While the skin does have some role in gas exchange, particularly through the sweat glands and pores, it is not a primary function like the others. The main organs responsible for respiration are the lungs, making respiration an unrelated process in the context of skin physiology. This understanding helps clarify the distinct functions of the skin compared to those of other systems in the body.