OMG plzzz SOMEONE HEL (ASA) explain why the enzymes are only needed in small amounts

Explanation:

I think Enzymes act as catalysts, substances that accelerate the rate of a chemical reaction, by reducing the activation energy necessary to initiate the reaction. ... Because the same enzyme molecule can be used over and over, only small quantities of enzymes are needed in the cell.

I think my answer will not be correct so once prefer to science teacher too.

its been noted for the past decade or so that there is some (approximately 5% to 7%) shrinkage in the brains of people who have schizophrenia, most notably in the gray matter, which is an important part structures in the brain’s amygdala, hippocampus and parahippocampus, which are all involved in memory storage and retrieval memory storage and retrieval.

explanation:

ive read articles

answer; /// i believe the correct answer is (reactants);