Cardiac action potential. The cardiac action potential is a brief change in voltage (membrane potential) across the cell membrane of heart cells. This is caused by the movement of charged atoms (called ions) between the inside and outside of the cell, through proteins called ion channels.
Smoke's Poutinerie is a Canadian nationwide poutine franchise founded by entrepreneur Ryan Smolkin. Founded in Toronto in 2008, its premiere location was the first poutine-exclusive restaurant in that town. Smolkin was inspired by Montreal restaurant La Banquise, which serves many different kinds of poutine. Smolkin frequents La Banquise whenever he visits Montreal.
It is thought that the disease originated in Africa and spread to the Americas in the 17th and 18th centuries through trading ships. The flavivirus that causes yellow fever was first identified in 1928 and the first vaccine against the disease was produced at the Rockefeller Institute in New York in 1937.