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.
NOTE: You may have noticed that two traits did not make the list: Intelligence and Common Sense. Although firefighters do need to possess a certain degree of intelligence, there are certainly many other professions that require more brain power than being a firefighter.