Differentiate between Resting potential and Action potential.

What does the extracellular fluid of an axon contain in a resting state?

In a resting neuron,the axonal membrane is

Which of the following statement/s is/are correct with respect to generation and conduction of nerve impulse?
i. The resting potential difference is $-70 \text{ mV}$.
ii. The voltage-gated $Na^{+}$ and $K^{+}$ channels operate together and are self-closing.
iii. At the peak of action potential,the potential difference rises to $+30$ to $+60 \text{ mV}$.
iv. In medullated nerve fibre,the action potential is conducted as a wave of membrane depolarization.
v. The resting potential is maintained by the closure of gated channels of $Na^{+}$ and $K^{+}$.

$A$ nerve impulse is generated in a nerve fiber when the membrane becomes more permeable to:

The propagation of an action potential during nerve impulse conduction is made possible by the movement of: