Which of the following is a function of the subcutaneous layer of the skin?

• A. Provides insulation and stores energy as fat
• B. Secretes sweat to regulate body temperature
• C. Produces melanin to protect against UV radiation
• D. Forms the outermost protective barrier of the body

Answer: (A)

Verified step by step guidance

1. Understand the structure of the skin: The skin is composed of three main layers—epidermis, dermis, and subcutaneous layer (also called the hypodermis). Each layer has distinct functions.
2. Focus on the subcutaneous layer: This layer is primarily made up of adipose tissue (fat) and connective tissue. It plays a role in insulation, energy storage, and cushioning the body.
3. Eliminate incorrect options: The subcutaneous layer does not secrete sweat (this is a function of sweat glands in the dermis), produce melanin (this is a function of melanocytes in the epidermis), or form the outermost protective barrier (this is the role of the epidermis).
4. Identify the correct function: The subcutaneous layer provides insulation to maintain body temperature and stores energy in the form of fat, which can be used by the body when needed.
5. Conclude the reasoning: Based on the structure and function of the subcutaneous layer, the correct answer is 'Provides insulation and stores energy as fat.'