Electron Microscopy Is a Useful Tool in the Study of Synaptic

Multiple Choice

Electron microscopy is a useful tool in the study of synaptic morphology. The electron microscope allowed researchers to determine that:

A) neurotransmitters are packaged into vesicles located at the end terminals of axons.
B) neurotransmitters are located only in select hormones in the bloodstream.
C) neurotransmitters are not chemicals, as had been previously thought.
D) there are more than 1000 neurotransmitters in the human body.