This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Which of the following happens when a nerve impulse arrives at the neuromuscular junction? \nSelect and explain. \nA. Release of calcium from Sarcoplasmic reticulum, B. ACh binds to receptors in Sarcolemmal membrane, C. Release of K+ into the Sarcoplasm, D. Sodium ions rush outside the Sarcoplasm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Molecules of ACh diffuse across the synaptic cleft and bind to ACh receptors on the motor end plate. Ref: Human Anatomy And Phsyiology, edited by Sanghani, Page 204', 'role': 'assistant'}]