As the food in the stomach is repeatedly squeezed and mixed with gastric juice, it is converted into a creamy paste called:

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.