Which of the following is NOT a function of the skeletal system?

The skeletal system serves several essential functions within the body, and understanding these roles helps clarify why the correct answer is the choice that involves electrical signal conduction.

The skeletal system is responsible for protection; it shields vital organs, such as the brain, heart, and lungs, from injury. Additionally, it plays a crucial role in locomotion, as bones provide a framework for muscles to attach to, enabling movement. Moreover, the skeletal system is involved in blood production, particularly within the bone marrow where red and white blood cells are generated.

On the other hand, electrical signal conduction is a function primarily associated with the nervous system, particularly neurons and synaptic transmissions. The skeletal system does not have an active role in conducting electrical impulses; that function lies within specialized cells and tissues of the nervous system. Hence, identifying electrical signal conduction as not being a function of the skeletal system is accurate and reflects an in-depth understanding of the distinct roles of various body systems.