Final answer:
Golgi tendon organs (GTOs) send inhibitory signals to motor neurons when stretching tension reaches t-hold and overrides the myotatic reflex (muscle spindle). GTOs are tension receptors located in the tendons that prevent excessive muscle contraction.
Step-by-step explanation:
Once the stretching tension reaches the t-hold and overrides the myotatic reflex (muscle spindle), Golgi tendon organs (GTOs) send inhibitory signals to the motor neurons, which causes the muscle to relax and prevents excessive contraction. GTOs are tension receptors located in the tendons. When the muscle tension becomes too high, GTOs respond by inhibiting the motor neurons, thereby reducing muscle contraction.
For example, if you are stretching your hamstring and the tension becomes too high, the GTOs will send inhibitory signals, causing your muscles to relax and preventing you from overstretching.