This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Neurotransmitters, Subject name: Physiology
[{'content': 'Endorphin release causes - \nSelect and explain. \nA. Analgesia, B. Allodynia, C. Hyperalgesia, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Analgesia o Primary action of endorphin (b-endorphin) is to inhibit pain.o Neurons containing b--endorphin descend from the hypothalamus to terminate on periaquenductal gray matter of midbrain. Periaqueductal gray matter send enkephalinergic and dynorphinergic neuron to medulla to inhibit pain by stimulating raphe nucleus.", 'role': 'assistant'}]