In impaired glucose tolerance (IGT), the levels of blood glucose are between normal and diabetic. People with IGT do not have diabetes. Each year, only 1-5% of people whose test results show IGT actually develop diabetes. And with retesting, as many as half of the people with IGT have normal oral glucose tolerance test results. Weight loss and exercise may help people with IGT return their glucose levels to normal. With diet and exercise as many as 60% will not developed diabetes or it will be considerably slowed in its development.
Reaction rates, temperature and catalysis. 1  As learned in previous modules, the rate of a reaction is increased by using a catalyst or increasing the temperature. 2  The effect of using a catalyst and increasing the temperature can be explained using the collision theory. The collision theory of reactions. The basic principle of the collision theory is that chemicals react when their particles collide with a certain minimum energy.
Catalyst Effects. A catalyst is a substance that participates in a chemical reaction and increases the reaction rate without undergoing a net chemical change itself. Consider, for example, the decomposition of hydrogen peroxide in the presence and absence of different catalysts.