The nerve impulse is another name of

Options

A. Resting potential
B. Polarised potential
C. Action potential
D. Repolarisation

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of a Neuron**: A neuron consists of three main parts: the cell body (soma), dendrites, and axon. The axon is responsible for transmitting nerve impulses away from the cell body.

2. **Resting State of a Neuron**: In a resting state, a neuron has a negative charge inside and a positive charge outside due to the unequal distribution of ions. This state is referred to as the polarized state.

3. **Resting Membrane Potential**: The potential difference across the axonal membrane when the neuron is at rest is known as the resting membrane potential, which is typically around -70 millivolts.

4. **Action Potential Generation**: When a neuron is stimulated (by a stimulus or neurotransmitter), the inside of the axon becomes positively charged while the outside becomes negatively charged. This change in charge is due to the influx of sodium ions (Na+), leading to depolarization.

5. **Definition of Action Potential**: The change in membrane potential from -70 millivolts to +30 millivolts during stimulation is known as action potential. This action potential is what propagates along the axon and is also referred to as a nerve impulse.

6. **Conclusion**: Therefore, the nerve impulse is another name for action potential. The correct answer to the question is option 3: action potential.

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