Answer: The correct answer is 1. outside and 2. inside.
Explanation:
During the resting potential (-70 mV), the concentration of Na+ is bigger outside than inside, so this situation generates a trend for moving inside. If we consider a scenario where the resting potential changes from -70 mV to +70 mV, we would realize that the electrical gradient would stop the entrance of Na+ ions and would make them to move outside.
Bubbles and fizz are an example of a chemical reaction.
