<em>The effect of enzyme on substrate depends o the concentration of substrate and it affects the rate of reaction.
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<u>Explanation:</u>
If the concentration of the substrate is low in a mixture, then substrates will bind to enzyme which will slow the rate of reaction. But if the concentration of the substrate is increased, then there will be <em>more substrate for enzymes to work on and the rate of reaction will be increased. </em>
There is a point upto which the enzymes will be involved in catalyzing action. When that threshold point is reached the increase in <em>concentration of substrate will no longer increase the rate of reaction instead the rate if reaction will be uniform. </em>
The parasympathetic nervous system causes this relaxed state it allows the body to reach a form of homeostasis this relax and digest is very important for repair and digestion