Question

What is the correct order of nerve impulse conduction through nerve fibre?

• A. [repolarisation] => [resting] => [depolarisation]
• B. [resting] => [depolarisation] => [repolarisation]
• C. [resting] => [repolarisation] => [depolarisation]
• D. [repolarisation] => [depolarisation]

Answer 1

The correct option is B

[resting] => [depolarisation] => [repolarisation]

The correct order of nerve impulse conduction is [resting] => [depolarisation] => [repolarisation]

An impulse begins when a neuron is stimulated by another neuron or by a stimulus in the environment. The cell membranes begin to change the flow of ions and a reversal of charges, the action potential, results. When the activation of nerve take place, there is a sudden change in the voltage across the wall of the axon, caused by the movement of ions in and out of the neuron. The propagation follows: [resting] => [depolarisation] => [repolarisation]