A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of human body mass.
Which statement describes the element he is studying?

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.