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.
If youâre in high school and want to know more about fire fighting, get started here. 1  Weâre committed to making your situation better. 2  The greatest responsibility of a firefighter is to interrupt the darkest day in a personâs life and give hope. 3  Contribute to the safety of your family and community by learning CPR.