Most small-molecule neurotransmitters are stored in small vesicles that range from 40 to 60 nm in diameter and, in electron micrographs, appear to have clear centers. The vesicles that store neuropeptides are larger, ranging from 90 to 250 nm in diameter.
The world's largest concentration of natural sandstone arches. 1  Hike the 1.5 mile trail leading to the base of Delicate Arch to experience one of the most breathtaking vistas in the world. 2  Your family will love the short trails in the Windows Section that lead right up to several massive arches.
When describing the height of the arch, the government claims it is 63 stories tall when using a 10-foot average story height, according to the National Park Service. Architects who want to build a taller room may create stories that are 14, 16 or even 20 feet high. Vaulted ceilings make a large difference in the height of stories.