This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Motor System, Subject name: Physiology
[{'content': 'The efferent limb of a myotatic reflex includes a(n): \nSelect and explain. \nA. Anterior horn motor neuron, B. Lateral horn visceromotor nucleus., C. Muscle spindle., D. Preganglionic sympathetic neuron', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The myotatic reflex is a monosynaptic, sretch reflex. The efferent limb consists of the axon of an anterior horn alpha motor neuron that innervates striated muscle fibers (effector). The afferent limb consists of a muscle spindle (receptor) and an Ia fiber (axon) of a spinal ganglion neuron.', 'role': 'assistant'}]