Voltage-gated ion channels are responsible for generation of electrical signals in cell membranes. Their principal subunits are members of a gene family and can function as voltage-gated ion channels by themselves. They are expressed in association with one or more auxiliary subunits which increase functional
3. Pass the medical exam. To be a firefighter, you will need to have coordination, agility, and strength, as well as an overall high level of physical fitness. You must also be in general good health and be free of any physical constraints.
Volunteer firefighting can be a great way to get involved in your community. If you're serious, then contact the local fire department and ask for an application. Be aware that this is a big commitment. You'll need to complete hundreds of hours of training, and you will need to be on call for local emergencies.