there are two types of energy

kinetic energy

oxidation - the gain of O2 loss of hydrogen and electrons

reduction - the gain of H2 and electrons loss of oxygen

metabolism - the coupling between the constant need for energy and the supply of nutrients which is intermittent

(constantly need for energy but only have intermittent need for energy)

anabolism - (build up of complex molecules from simpler ones)

catabolism - (breakdown of complex molecules for reabsorption)

there are two nutritional states

absorptive (fed)

postabsorptive (fasting)