Function of Potassium in the BodyIVThe part K+ plays in metabolismMaintenance oftherestingmembranepoFentiaioaf exdtatdesiells in the BodyMaintenance and regulation of osmoticpressureand acid-basebalancebothinICFandECF
Function of Potassium in the Body Ⅳ Function of Potassium in the Body The part K+ plays in metabolism Maintenance of the resting membrane potential of excitable cells Maintenance and regulation of osmotic pressure and acid-base balance both in ICF and ECF
IIPart
Part Ⅱ
Potassium Imbalance-abnormal changes in [K+1 in ECF
Potassium Imbalance -abnormal changes in [K+] in ECF
HypokalemiaSerum[K+j<3.5mmol/L,mayormaynotbeassociatedwithKdeficit
Hypokalemia Serum [K+ ]<3.5mmol/L,may or may not be associated with K deficit
EtiologyandPathogenesisDietary intakeSerum[K+]<3.5mmol/LTotal bodyECF2%ICFKcontentExcessivelossesshifting[K*] may or may-decreasednotbedecreased(K deficit)or一normalG.Ilosses---diarrhea,vomitingRenal losses---diuretics,some diseases ofthekidneyLossesfromtheskin---profusesweating,burnsCrudecottonseedoil poisoning
ECF 2% Dietary intake Serum [K+ ] < 3.5mmol/L G.I losses-diarrhea, vomiting Renal losses-diuretics, some diseases of the kidney Losses from the skin-profuse sweating, burns Excessive losses ICF [K+ ] may or may not be decreased Total body K content — decreased (K deficit) shifting — normal Crude cotton seed oil poisoning or Etiology and Pathogenesis