Neural Control And Coordination Question 47
Question: The primary cause for the existence of resting membrane potential can be attributed to:
Options:
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.
Show Answer
Answer:
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}orE_{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.
BETA
