A) Potassium diffusion potential
B) Presence of electrogenic pump
C) Diffusion potentials of \[N{{a}^{+}},{{K}^{+}}andC{{l}^{-}}\]
D) Anions like proteins, phosphates and sulphates.
Correct Answer: A
Solution :
[a] The resting membrane potential is primarily due to diffusion potential of\[{{K}^{+}}\]. The \[{{E}_{k}}\] is closer to resting membrane potential, than \[{{K}_{Na}}or{{E}_{cl}}.\] Presence of electrogenic pump will help to maintain the potential difference, but not a primary cause for resting membrane potential. The \[N{{a}^{+}}\] pump contributes only 4 mv to the resting membrane potential.
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