The speed of propagation is related to the size of the axon. The speed of action potential propagation is usually directly related to the size of the axon. Big axons result in fast transmission rates. For example, the squid has an axon nearly 1 mm in diameter that initiates a rapid escape reflex. Increasing the size of the axon retains more of the sodium ions that form the internal depolarisation wave inside the axon.
About the only thing known for sure is that the 119th Boston Marathon will be held on Monday, April 20, 2015. As for everything else, the initial discussions about next year are already underway. But itâs unlikely the race will return with a field of approximately 36,000 runners in 2015.
The LA Marathon sends runners from Dodger Stadium near downtown Los Angeles, through Hollywood and Beverly Hills before finishing near the ocean in Santa Monica. Photo: Courtesy of the LA Marathon. The LA Marathon is back among the top four races in the U.S. with 25,000 participants. The LA Marathon has been building some big momentum in recent years and itâs only increased since the start of 2014. Once one of the top marathons in the U.S., various ownership problems and a decline in interest were leading to its demise in the the mid-2000s.