What are the six primary functions of the skin?

• A. Protection, absorption, secretion, and excretion
• B. Protection, sensation, heat regulation, excretion, secretion, and absorption
• C. Heat regulation, sensation, nourishment, and protection
• D. Sensation, filtration, absorption, and metabolism

Answer: (B)

The correct choice identifies the six primary functions of the skin as protection, sensation, heat regulation, excretion, secretion, and absorption. Each of these functions plays a crucial role in maintaining homeostasis and overall health.

• Protection refers to the skin's ability to act as a barrier against harmful pathogens, chemicals, and physical injuries. The keratinized outer layer of the skin helps prevent water loss and shields internal structures from external threats.

• Sensation is facilitated by sensory receptors located in the skin, allowing the body to feel touch, pressure, temperature, and pain, which is essential for interacting with the environment and protecting the body from harm.

• Heat regulation is vital for maintaining a stable internal body temperature. The skin helps dissipate excess heat through processes such as vasodilation and perspiration.

• Excretion is accomplished through sweat and sebaceous glands, which remove waste products and help regulate the body’s temperature and moisture levels.

• Secretion pertains to the skin's production of essential substances, such as sebum, which lubricates and waterproofs the skin, as well as antimicrobial agents that prevent infection.

• Absorption refers to the skin’s ability to absorb specific substances, including certain medications and moisture, which can affect the body’s