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3. Old stuff 3.2.3. Physiology 3.2.3.4. General physiology 3.2.3.4.6. Electrolytes 3.2.3.4.6.1. Distribution of ions
3.2.3.4.6.1.3. Potassium distribution Potassium distribution
Extracellular vs intracellular
Extracellular [K+]
= 4 mmol/L
Intracellular [K+]
= 140 mmol/L
Body potassium distribution
[KB2:p15]
Total body K+
= 40-45 mmol/kg
- Intracellular fluid = 90%
- Extracellular fluid = 2%
- Bone = 8%
NB:
- K+ in bone is not readily exchangeable
- Exchangeable K+ can be measured using 42K+
Also see Potassium