This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Physiology, Subject name: Physiology
[{'content': 'Exocytosis: \nSelect and explain. \nA. Is a calcium dependent process, B. Can be constitutive or non-constitutive, C. Requires SNARE proteins, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Exocytosis is a calcium dependent process. In non-constitutive exocytosis, secretory product after synthesis and processing in the RER and GA, is stored in the cytoplasm in secretory granules until an appropriate signal for secretion is received In constitutive exocytosis, prompt transpo of secretory product to the cell membrane in vesicles occurs with little or no processing or storage SNARE proteins that are involved in exocytosis', 'role': 'assistant'}]