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': 'The process by which fusion of part of a cell membrane occurs is/area) Cell divisionb) Endocytosisc) Exocytosisd) Virus replication \nSelect and explain. \nA. a, B. c, C. ac, D. bc', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In endocytosis, the particles to be brought inside the cell invaginate into the cell around which the cell membrane fuses.\xa0In exocytosis, the intracellular content to be released into the ECF fuses to the cell membrane. Then it is packed in a vesicle formed by the cell membrane and is released to the ECF.', 'role': 'assistant'}]