Question

Why neurolema is polarized in unstimulated condition

Answer 1

Neurons carry out their specialized functions of communication and integration because their outer cell membrane has special properties. ... As in all cells, the cell membrane of a neuron ispolarized. This means that there is an electrical difference across the cell membrane.

Answer 2

Answer:

Neurolema like all body cells exist in a polarized state. The net charge of the neurolema is about - 65 to - 70 millivolts.

This is the reason for a polarized unstimulated neurolema.

Explanation:

The neurolema is the cell membrane of a neuron.

The polarization of the nuerolema is due to existence of more Na⁺ outside the neuron than inside (net positive charge is greater outside the neuron than inside). This makes the neurolema to a have a net negative charge.

More information

When the neuron gets a stimulus (is stimulated), the Na⁺ channels are opened and the Na⁺ moves into the cells which causes depolarization ( the neurolema becomes more positive).

It is this depolarization along the neurons axon that brings about neuronal communication. The depolarization at the end of the neuron causes release of neurotransmitters which continues the communication process.