The carbon cycle involves an exchange of carbon between the atmosphere and geosphere only.

The correct answer for the question that is being presented above is this one: "FALSE." The carbon cycle involves an exchange of carbon between the atmosphere and geosphere only. This statement is false -- as well as the geosphere, the carbon cycle also moves carbon between the atmosphere, the biosphere, and the hydrosphere.

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.