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.
Ion channels come in many different types, some of which are selective for specific types of ions such as K+, Na+, and Ca2+. Â© 2002 Nature Publishing Group Marban, MarbÃ¡n. E cardiac. Channelopathies nature, 415-213 (218). 2002 all rights. reserved