When the valence electrons are gained or lost to achieve an octet, what happens
to the number of protons and the
neutrons in the atom?

The answer is d. when it begins to fall back to the child's hand

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.