What are the main factors that alter the speed of enzymatic reactions?

What are the steps in metabolic pathways, and can you use an example of how to explain metabolic pathways?

What is metabolism, and how are different types of energy useful for metabolism? Explain the three main uses of metabolic energy.  Give examples.

When you exercise, your muscles are using ATP to do the movements. Thus, the cell is doing cellular respiration in order to replace the ATP it has used. A) Draw a series of diagrams showing the energy transfers that occur during exercise (include: ATP, muscle, heat, cell respiration, glucose). B) When we exercise, we produce a lot of heat, to cool us down, our body produces sweat. According to the laws of thermodynamics, where is the heat coming from? C) When we exercise to lose weight, where is that mass going (do we sweat it out, it turns into heat, becomes digestive waste, how do we eliminate it?)?