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.
The park is open 24 hours/day, 365 days/year; however the visitor center hours vary by season. (435) 719-2299. Located just 5 miles (8 km) north of Moab is Arches National Park, which contains the world's largest concentration of natural sandstone arches.Although over 2,000 arches are located within the park's 76,518 acres, the park also contains an astounding variety of other geological formations.he park is open 24 hours/day, 365 days/year; however the visitor center hours vary by season. (435) 719-2299. Located just 5 miles (8 km) north of Moab is Arches National Park, which contains the world's largest concentration of natural sandstone arches.