Enzymes affect the speed of reactions predominantly. In some instances in which more than one reaction is possible, enzymes increase the speed of the normally slower reaction enough to make it predominate, while the other possible reaction is effectively suppressed.
enzymes are never consumed in a chemical reaction, therefore the answer to your question is that enzymes that affect the speed of a chemical reaction without being consumed are indeed called enzymes.
At excessive temperatures, enzymes usually denature or break down into other molecules, thus failing to preform their specific function.Other than that, heat does not affect enzymes much but it does increase the speed of the reaction.
Enzymes fasten chemical reactions, inhibitors blocks the enzymes and they will not accelerate the reaction.
They lower the activation energy needed to start a chemical reaction.
Enzymes speed up a reaction but they are not changed by the reaction. They are a protein molecule that helps other organic molecules enter into chemical reactions with one another but is itself unaffected by these reactions. In other words, enzymes act as catalysts for organic biochemical reactions.
Heat generally speeds up the reaction, while cold will slow it down. The enzymes in the cold are frozen.
Enzymes have no effect on the overall thermodynamics of a reaction.
Enzymes act as catalysts. They speed up the reaction time.
Enzymes lower the activation energy (or free energy of activation for the very scientific) of the chemical reactions they catalyse. The enzymes can make a reaction proceed much more quickly than it otherwise would by astronomical figures, e.g. 109 times! Enzymes don't affect the equilibrium position, but they do affect the rate.
The enzymes in the cell act as catalysts for chemical reactions. They lower the activation energy of these reactions in order to speed up the reaction rate.
By changing the speed of the reaction.
Enzymes facilitate chemical reactions. Many are catalysts that decrease the amount of energy required for or increase the rate of chemical reactions to take place. Many enzymes work by bringing the substrates of a chemical reaction into close proximity and in favorable orientation. They may also allow the chemical reaction to use chemically stored energy (ex. ATP, GTP etc) to power the reaction. Without these enzymes, some of the reactions would be extremely slow or require excessive temperatures to complete.