Action potential of cardial muscles (myyocytes) pass through four different phases; phase 0,1,2,3 and 4. It starts with rapid depolarization in phase 1, followed by rapid but short repolarization, then plateau in phase 2, which followed by rapid repolariz

The glucose molecules transported into the β cells of islets of Langerhans are rapidly metabolized to produce ATP which in turn close the ATP sensitive potassium K channels. Closure of K channels results opening of voltage sensitive calcium Ca channels. C