Vetinerary Assistant Practice Exam

What is the function of the fibula?

1. It connects the foot to the leg

2. It is the main weight-bearing bone of the distal leg

3. It provides stability to the knee joint

4. It protects the lower leg muscles

The correct answer is: It is the main weight-bearing bone of the distal leg

The function of the fibula primarily involves providing stability to the ankle and supporting the muscles of the lower leg rather than being a weight-bearing bone. The fibula, which runs parallel to the tibia, does not serve as the main load-bearing bone; that role belongs to the tibia. While the fibula does contribute to the stability of the leg and ankle, its main functions also include serving as an attachment point for muscles that facilitate movement of the ankle and foot. The other options each highlight aspects related to the anatomy and function of the leg but do not accurately define the primary role of the fibula. For instance, connecting the foot to the leg is primarily the role of joints like the ankle, and the fibula plays a lesser role in that connection. Additionally, while the fibula does aid in stabilizing the knee indirectly through muscle attachments, it does not provide stability to the knee joint itself, which is primarily supported by the femur and other ligaments. Lastly, the idea that it protects the lower leg muscles is somewhat misleading since the fibula's positioning does not offer direct protection but rather supports muscle function.