When particles of a gas lose heat, they a. slow down and become liquid. b. speed up and become liquid. c. slow down and become solid.

The correct answer is A) they slow down and become liquid

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.