Final answer:
The Golgi tendon organ detects skeletal muscle tension.
Step-by-step explanation:
The sensory receptor that detects skeletal muscle tension is the Golgi tendon organ. Golgi tendon organs are tension receptors located in the tendons and they respond to the force of muscle contraction. When a muscle contracts, the Golgi tendon organ detects the tension in the tendon and sends signals to the central nervous system to regulate muscle activity.