Question

In a resting potential, an example of a cation that is more abundant as a solute inside a neuron than it is in the interstitial fluid outside the neuron is ________.

a. Cl
b. K
c. HCO₃
d. Na
e. Ca

Answer 1

Answer: B) k

Step-by-step explanation:

potassium is an intracellular cation.

In resting state its gated channels are shut; so 95% are trapped inside the interstitial fluids of the axoplasm;Although these channels leak for some to escape down the concentration gradient to the extracellular environments of the axon, most of these ion are concentrated inside the interstitial fluid of the axon to maintain RMP