When performing a biceps curl, tension in the biceps brachii muscle increases. Which of the following structures detects and responds to the tension by reflexively reducing muscle activation? a. Golgi tendon organ. b. Muscle spindle. c. Pacinian corpuscle. d. Lamellar corpuscle.

Answer: Golgi tendon organ.

Explanation:

The Golgi tendon organ also known as the tendon organ is the proprioceptive sensory receptor organ which an detect the change in the muscle tension.

It is found at the origins and at the insertions of the skeletal muscle fibers into the tendons situated in the skeletal muscles.

This responds to the tension by reducing the muscle activation.