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.
You must also be a U.S. citizen to become a firefighter. You must pass a background check and in some instances, a drug screening as part of the requirements to be a firefighter.irefighting 101. by FireRescue1 Staff. The first step in a career in firefighting is to find out what the requirements are to be a firefighter in the location where you plan to be employed. The requirements to be a firefighter in a large metropolis like New York City or Chicago are extremely stringent.