ACE Personal Trainer Practice Exam

What is one of the primary functions of the skeletal system?

1. Production of hormones

2. Regulation of body temperature

3. Support and formation of blood cells

4. Facilitation of respiration

The correct answer is: Support and formation of blood cells

The primary functions of the skeletal system include providing support to the body, protecting vital organs, facilitating movement in conjunction with the muscular system, and housing bone marrow, which is critical for the production of blood cells. This includes red blood cells, white blood cells, and platelets, highlighting the importance of the skeletal system in hematopoiesis. While the other options involve important bodily functions, they do not directly pertain to the primary roles of the skeletal system. For example, the production of hormones typically occurs in glands such as the pancreas or thyroid, and the regulation of body temperature is primarily managed by the integumentary and endocrine systems. Facilitation of respiration is mainly the role of the respiratory system, although the ribcage does aid in the process by protecting the lungs and assisting with the mechanics of breathing. Thus, the support and formation of blood cells best encapsulates the skeletal system's crucial contributions to overall health and functionality.