What is the role of NAD+ in cellular respiration?

In cellular respiration, NAD+ functions as an electron carrier. NAD+ is also referred to as coenzyme 1. It plays a key role in energy metabolism by accepting and donating electrons. The low energy form NAD+ is raised to the high energy form NADH.  It accepts two electrons and a hydrogen in reaching the high energy state. The NAD+ is used in redox reactions in the cell and acts as a reducing agent. NADH contributes to oxidation in cell processes like glycolysis to help with the oxidation of glucose.