Final answer:
Enzymes and energy-supplying molecules like ATP can speed up reactions besides endergonic and exergonic reactions.
Step-by-step explanation:
There are several factors that can speed up reactions besides endergonic and exergonic reactions. One such factor is the use of enzymes. Enzymes are organic catalysts that increase the rate of reaction by lowering the activation energy required for the reaction to occur. They do this by providing an alternative reaction pathway with a lower activation energy. Another factor that can speed up reactions is the use of energy-supplying molecules like adenosine triphosphate (ATP). ATP is a small molecule that contains the potential for a quick burst of energy, which can be used to perform cellular work and power energy-requiring reactions.