▁heart , ▁li ver , ▁kid ney , ▁and ▁s ple en , ▁and ▁consider ably ▁smaller ▁quantities ▁in ▁the ▁pan cre as , ▁brain , ▁and ▁ser um . ▁Cob alt ▁is ▁a ▁necessary ▁component ▁of ▁vit amin ▁B 1 2 ▁and ▁a ▁fundamental ▁co enz yme ▁of ▁cell ▁mit osis . ▁Cob alt ▁is ▁cru cial ▁for ▁am ino ▁acid ▁formation ▁and ▁some ▁prote ins ▁to ▁create ▁my elin ▁she ath ▁in ▁n erve ▁cells . ▁Cob alt ▁also ▁plays ▁a ▁role ▁in ▁creating ▁ne uro trans mit ters , ▁which ▁are ▁vital ▁for ▁proper ▁function ▁within ▁the ▁organ ism . ▁ ▁ad en os ine ▁tri ph osph ate ▁( AT P ) ▁is ▁a ▁common ▁mole c ule ▁which ▁stores ▁energy ▁in ▁an ▁accessible ▁form . ▁B one ▁is ▁calci um ▁ph osph ate . ▁ ▁Fe 2 + / Fe 3 + as ▁found ▁in ▁ha em og lo bin , ▁the ▁main ▁o xygen ▁carrying ▁mole c ule ▁has ▁a ▁central ▁iron ▁ion . ▁▁ ▁source ▁of ▁nit ro gen ▁in ▁plants ▁for ▁the ▁synth esis ▁of ▁prote ins . ▁ ▁Bi ological ▁Function s ▁of ▁In organ ic ▁I ons ▁ ▁I on ▁Ch annels ▁ ▁K + ▁Ch annels ▁ ▁Pot ass ium ▁ion ▁channels ▁play ▁a ▁key ▁role ▁in ▁maintain ing ▁the ▁memb rane ' s ▁electric ▁potential . ▁These ▁ion ▁channels ▁are ▁present ▁in ▁many ▁various ▁bi ological ▁systems . ▁They ▁frequently ▁play ▁a ▁role ▁in ▁reg ulation ▁of ▁cell ular ▁level ▁processes