This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
All are true regarding golgi tendon organ, EXCEPT: 
Select and explain. 
A. Inverse stretch reflex, B. Detects changes in muscle length, C. Inhibits alpha motor neuron, D. Encapsulated sensory receptor
B: Detects changes in muscle length
Answer: B: Detects changes in muscle length 
Explanation: Golgi tendon organs are encapsulated sensory receptors through which muscle fibres pass. They are stimulated by increased tension in the connecting muscle thus it basically detects muscle tension. It is the receptor for inverse stretch reflex and when stimulated it causes inhibiton of alpha motor neurons. Ref: Ganong's Review of Medical Physiology, 22nd Edition, Page 131