Anatomy Practice Exam

Which statement best describes the integumentary system?

1. Enables the production of insulin

2. Acts as a barrier and aids in thermoregulation

3. Regulates muscle contractions during movement

4. Serves primarily as a framework for the body

The correct answer is: Acts as a barrier and aids in thermoregulation

The integumentary system is primarily responsible for protecting the body from external harm, serving as a barrier against environmental hazards such as pathogens, UV radiation, and physical injuries. In addition to its protective function, it plays a crucial role in thermoregulation. The skin contains sweat glands that help regulate body temperature by releasing sweat, which cools the skin as it evaporates. Blood vessels in the skin also constrict or dilate to regulate heat loss, further maintaining a stable internal temperature. In contrast, the other statements do not accurately describe the integumentary system's functions. The production of insulin is primarily associated with the endocrine system, particularly the pancreas. Muscle contractions are related to the muscular system, and while the integumentary system contributes to structural support, it does not primarily serve as the body's framework, which is mainly the role of the skeletal system. Thus, the accurate description of the integumentary system highlights its vital roles in barrier function and temperature regulation.