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: Medicine
[{'content': 'Specialized cell membrane structures that decrease electrical resistance between the cells allowing action potentials to pass efficiently from one cell to adjacent cells are the \nSelect and explain. \nA. Extensive capillary network, B. Intercalated disks, C. Mitochondria, D. Gap junctions', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D:\xa0Gap junctions\xa0are a specialized intercellular connection between a multitude of animal cell-types. They directly connect the cytoplasm of two cells, which allows various molecules, ions and electrical impulses to directly pass through a regulated gate between cells.\nA:\xa0Extensive capillary networks\xa0allows the abundant supply of oxygen and nutrients on tissues such as skeletal muscle, liver and kidney.\nB:\xa0Intercalated disks\xa0support synchronized contraction of cardiac tissue. They occur at the Z-line of the sarcomere and can be visualized easily when observing a longitudinal section of the tissue.\nC:\xa0Mitochondrion\xa0is\xa0an organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur.', 'role': 'assistant'}]