Catalysts generally speed up chemical reactions.
Endothermic Reactions
No. The speed of all chemical rections increases when temperature rises.
Stimulants - but more probably catalyst.
WE do not know what effect you are asking about, but enzymes are proteins that act as catalysts, they speed up chemical reactions.
catalysts speed up a reaction
In the presence of catalysts the rate of reaction is higher.
They speed a chemical reaction. Add: Catalysts lower the activation energy needed to start a chemical reaction.
Catalysts are used to speed up the chemical reactions. By usama javed
A catalyst can speed up a chemical reaction. Another possible answer in the Biological sense is that Enzymes speed up chemical reactions, but these enzymes are catalysts of the chemical reactions.Different catalysts catalyse different reactions. For example iron is used as a catalyst in the Haber process (manufacture of ammonia).
Catalysts help chemical reactions: the activation energy is lowered, the reaction rate is accelerated. Catalysts are not exhausted in the reaction and are recyclable.
Catalysts
Substances that speed up the rate of reaction are called catalysts. Catalysts participate in chemical reaction but does not get consumed. Yeast is an example of biological catalyst.