In terms of action potential initiation, the intake of ___ causes more voltage gated ion channels to ___ down the lin -Na2+, open
-Ca2+, open
-Na2+, close
-Mg2+, open

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.