How can a scientist lower the materials density

In the context of the neural impulse, which of the following is true about the depolarization of neuron membranes?

Me with these questions image attached

The equation shows cellular respiration. during cellular respiration, glucose combines with oxygen to form carbon dioxide, water, and atp. what happens to the energy in the bonds in glucose? the energy is transferred to oxygen. the energy is transferred to carbon dioxide. the energy is transferred to water. the energy is transferred to atp.