During voluntary movements, Golgi tendon organ has an impoant role to play because it continuously relays to the efferent neurons:
Length of the muscle at rest
Change in angle of joint during motion
Change in length of muscle before and after the movement
Tension in the muscle
Ans: D. Tension in the muscle(Ref.: Ganong 25/e p232; Guyton 13/e p697, 701).Golgi tendon organ senses muscle tension."The Golgi organ (also called Golgi tendon organ, GTO, tendon organ, neurotendinous organ or neurotendinous spindle) senses changes in muscle tension.It is a proprioceptive sensory receptor organ that is at the origins and inseion of skeletal muscle fibers into the tendons of skeletal muscle. It provides the sensory component of the Golgi tendon reflex.