Explain the following processes :
Polarisation of the membrane of a nerve fibre

Explanation

### Step-by-Step Solution:

1. **Definition of Polarization**:
- Polarization refers to the state of a nerve fiber membrane when it has a difference in electrical charge across its membrane, leading to a resting potential. This is essential for the conduction of nerve impulses.

2. **Resting Phase**:
- During the resting phase of a nerve fiber, the membrane is not actively transmitting a signal. At this stage, the concentrations of ions inside and outside the nerve fiber are different. Specifically, there is a higher concentration of potassium ions (K⁺) inside the cell and a lower concentration of sodium ions (Na⁺).

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