Two of the following statements are false. circle the letter and fix each statement to make it true. a. enzymes are not used up by a chemical reaction b. enzymes to speed up chemical reactions c. enzymes are made up of proteins d. enzymes are needed for a chemical reaction to occur

D and c is the answer you msy be looking for

The awnser is b i believe

Neurotransmitters are messengers responsible for communication between neurons. they are released from synaptic vesicles and are received by receptors.  the communication is referred to as neurotransmission. the following statement is true about neurotransmitters: a. they're stored in synaptic vesicles in the axon.