The depolarization of nerve membrane takes place through influx of . . . . . . ions.

What is the nature of the reversal potential in a neuron?

The mineral necessary for nervous conduction is

Consider the statements as True/False:
$I$. The axoplasm inside the axon contains a high concentration of $K^{+}$ and negatively charged proteins.
$II$. The axoplasm inside the axon contains a low concentration of $Na^{+}$.
$III$. The fluid outside the axon contains a low concentration of $K^{+}$.
$IV$. The fluid outside the axon contains a high concentration of $Mg^{++}$ and negatively charged proteins.
The correct option is:

If the inside of the membrane becomes more negative,it leads to:

During the refractory period,the nerve fiber: