What is the effect of norepinephrine on the heart?

Norepinephrine increases heart rate and blood pressure, triggers the release of glucose from energy stores, increases blood flow to the skeletal muscles etc

the cells uses some of the atoms of the glucose molecules to atp molecules. the atoms of the glucose molecules will then be converted into energy which will be eventually stored in atp. the energy produced which are stored in atp are coming from the glucose’s chemical bonds.