Question

Depolarisation is:

(a) A specific period in which K+ ions diffuse out of the neuron due to a change in membrane permeability
(b) The interior of the cell becoming less negative due to the influx of Na+ ions

Answer 1

Depolarisation is when the interior of the cell becomes less negative due to the influx of Na+ ions.

Step-by-step explanation:

Depolarisation occurs when the interior of the cell becomes less negative due to the influx of Na+ ions. When a stimulus causes the membrane to become permeable to Na+, Na+ ions rush into the cell, resulting in depolarization. This is a critical step in the generation of an action potential in a neuron.