Predict: Why aren't all organisms made of just one cell? Why do cells divide, instead of simply growing larger?

Multicellular organisms use different types of cells to function not just one cell. If cells grew larger that cell would be more demanding.

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.