Organisms living near hydrothermal vents have no access to light so they get there energy from?

Is a process called chemosynthesis, microbes at the base of the foodchain convert chemicals from the vents into usable energy.

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.