HOSA Emergency Medical Technician (EMT) Practice Test

The correct answer is discs because intervertebral discs are specifically designed to act as shock absorbers in the spine. They are located between the vertebrae and consist of a tough outer layer and a gel-like center, which allows them to cushion the impacts and forces that the spine encounters while we move, jump, or perform other activities. This cushioning effect is crucial for protecting the vertebrae and preventing injury. In contrast, muscles play a role in movement and stabilization but do not serve a primary function of shock absorption. Ligaments provide stability by connecting bones to each other but also do not absorb shock to the same extent as the discs. Tendons connect muscles to bones and enable movement but also do not fulfill a shock-absorbing role. Thus, intervertebral discs are uniquely suited for the task of absorbing shock in the back.