MCQ – 90702

In 35 year old patient due to intravascular homolysis, serum K+ increased to 5.5 mEq/L. What will happen to resting membrane potential in this patient

Correct Answer � A Explanation

– The resting membrane potential (RMP) is set by Na+ & K+ ion gradients.
– ↑ extracellular K+ → ↓ K+ gradient → less K+ efflux.
– Less K+ exits → cell becomes less negative/more positive.
– Option A: More positive is correct due to the physiologic effect of ↑ extracellular K+.