1. AKA: Atrial ectopics, Atrial extrasystoles, Atrial premature beats, Atrial premature depolarisations

2. A depolarisation of the vacuolar membrane (VM) potential Alkalises the cytosol of root hairs

3. Depolarisation is observed if the resting potential is increased above 110 mV by Anelectrotonic pulses

4. Luminance and frequency modulations were eliminated when pharmacological manipulations inhibited depolarisation of activating terminals at light on.

5. The myocardial answer of the cell on an adequate stimulus is the generation of a self-regenerating depolarisation wave called excitability.

6. Depolarisation of the vacuolar membrane caused a rapid increase in the Ca 2+ concentration and Alkalised the cytosol, while hyperpolarisation led to the opposite responses