How does the Golgi tendon organ respond to prolonged stretching?

The Golgi tendon organ is a sensory receptor located at the junction of muscles and tendons that plays a critical role in monitoring tension. When a muscle is subjected to prolonged stretching or increased tension, the Golgi tendon organ becomes activated. Its primary function is to protect muscles and tendons from damage due to excessive force.

When the Golgi tendon organ detects high levels of tension, it triggers a reflex mechanism that causes the agonist muscle (the muscle being stretched) to relax and the antagonist muscle (the opposing muscle) to contract. This reflexive contraction of the antagonist muscle serves to inhibit the agonist muscle, helping to prevent injury by reducing excessive tension within the muscle. Thus, this response emphasizes the protective mechanism of the Golgi tendon organ, enabling the body to maintain balance and stability during movement.

This correctly highlights the role of the Golgi tendon organ in facilitating a reflex contraction of the antagonist muscle during prolonged stretching, making it a vital component of the neuromuscular system's feedback loop.