This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
[{'content': 'Muscle spindle function is: \nSelect and explain. \nA. Length, B. Stretch, C. Touch, D. Temperature', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A. LengthFunctions of Muscle spindlea. Sensing and Maintaining normal muscle length (By Length servo and Follow up servo mechanism)b. Stretch Reflexc. Muscle tone (Due to Gamma efferent discharge)d. Body Posture (Postural reflex at spinal cord level)So both stretch and length are functions of muscle spindle but the primary function is maintenance of length.Pneumonic: Golgi tendon organ is for tension (t for tension, t for tendon) Muscle spindle is for length', 'role': 'assistant'}]