Action Potential

2011-03-06 by smapg

http://www.youtube.com/watch?v=yrsJ9HlnZ5s&feature=related

http://www.youtube.com/watch?v=SCasruJT-DU&NR=1

http://www.youtube.com/watch?v=vvxXnQuvTD8&feature=related

http://www.youtube.com/watch?v=90cj4NX87Yk&feature=related