Question: as a result of ach stimulation calcium ions are released from the
[{'answer': 'the extracellular fluid', 'provenance': [{'wikipedia_id': '681908', 'title': 'Neuromuscular junction', 'start_paragraph_id': 9, 'start_character': 331, 'end_paragraph_id': 9, 'end_character': 354, 'bleu_score': 1.0, 'section': 'Section::::Structure and function.:Quantal transmission.\n'}]}]