Things to remember. 1  Myasthenia gravis is an autoimmune disease that causes muscle weakness. 2  The symptoms are caused by the immune system interfering with the transmission of messages from the nervous system to the muscles. 3  There is no cure, but the symptoms can be managed.
Lake Nipigon is the largest inland lake in Ontario. Only the Great Lakes are larger. Lake of the Woods is actually 11% smaller even though it has a reputation for being the largest. Lake Nipigon consists of 2802 miles 2 (4510 km 2) of pristine water and dotted with hundreds of islands.
It was also known as Lake Toronto until it was renamed by John Graves Simcoe, the first Lieutenant-Governor of Upper Canada, in memory of his father, Captain John Simcoe, Royal Navy. The lake is bordered by Simcoe County, Durham Region, and York Region.The city of Barrie is located on Kempenfelt Bay, and Orillia is located at the entrance to Lake Couchiching.istory [edit]. Lake Simcoe is a remnant of a much bigger, prehistoric lake known as Lake Algonquin. This lake's basin also included Lake Huron, Lake Michigan, Lake Superior, Lake Nipigon, and Lake Nipissing.