What two-word term has been used to describe the annual shopping and sports mayhem in Philadelphia and the time when U. S. retailers typically show a profit?

Idont really understand

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.