B3.4 identify the earth’s four spheres and describe the relationship that must exist between these spheres if diversity and sustainability are to be maintained.

The earths four hemispheres are east , west , north and south. the relationship is they all go in different directions.

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.