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': 'Gamma efferent system is involved in \nSelect and explain. \nA. Tendon reflex, B. Clonus, C. Muscle tone, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: (D) All of the above # Motor neurons of y efferent system are regulated to a large degree by descending tracts from a number of areas in the brain.> Golgi tendon organs, are stimulated by both passive stretch and active contraction of the muscle.> The muscles are generally hypotonic when the rate of y efferent discharge is low and hypertonic when it is high.> Increased y efferent discharge is present is inclonus> Ankle clonus is atypical example.', 'role': 'assistant'}]