Internal Potassium balance

Q) If ph >7.4, How much does plasma potassium concentration change for every 0.1 unit increase of the extracellular pH ?

a) Potassium decrease by 0.3meq/l

b) K+ increase by 0.3 meq/l

c) Potassium decrease by 1.5 meq/l

d) K+increase by 1.5 meq/l


Free answer

a

Acid-base disturbances cause potassium to shift into and out of cells. This is called internal potassium balance and was discovered in 1956. In alkalosis (increase in ph,) K+ falls and in Acidosis potassium concentration will increase. For every 0.1 fall in ph, K+ increases by 0.3-0.6 meql/l

Metabolic acidosis- in a plasma potassium concentration that is elevated in relation to total body stores. 

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