Kinetics  Broadly speaking, the factors that influence chemical reaction rates may be summarised as follows. Chemical nature of reactants (e.g. is the chemical reaction thermodynamically “downhill” so that it can occur spontaneously at all?) Reactant Concentration (or pressure for a gas) Physical state of reactants (e.g. phase, or surface area of solids) Presence of catalyst Temperature  For each of the following observations, which one of the five factors is most important, and briefly explain how/why that is the case.  (a) The ability to sustain aerobic exercise is limited by the amount of haemoglobin in the blood.  (b) Non-starch polysaccharides are large complex carbohydrates, and an important source of dietary fibre. Their chemical energy content is similar to other carbohydrates like sucrose. These molecules do not undergo respiration via by human digestion, but some bacteria have specialised proteins that can process non-starch polysaccharides. (c) Potato is made edible by cooking it (d) Digestion is enhanced by chewing our food Thank you