Cattle : âBeefâ cattle slaughtered at 18 months young; dairy cows slaughtered at 4 to 5 years young; Natural life span: 18 to 25+ years. Veal Calves: Slaughtered at 16 weeks young; Natural life span: 18 to 25+ years. Goats: Slaughtered at 3 to 5 months young; Natural life span: 12 to 14 years.
Definition of Ion channel. Ion channel: A protein that acts as a pore in a cell membrane and permits the selective passage of ions (such as potassium ions, sodium ions, and calcium ions), by means of which electrical current passes in and out of the cell.
Voltage-gated Na + channels are made up of two subunits: an Î±-subunit that is the pore domain of the channel through which Na + flows, and a Î²-subunit that has a number of functions, including regulating channel expression and interacting with the extracellular matrix and the cytoskeleton.