This action potential moves as an electrical wave along the axon 4. It moves away from areas of stimulation, with a refractory period during which the cell membrane cannot be stimulated C. Direction of movement 1. Action potentials move towards cell bodies in the dendrites 2. They move away from cell bodies in axons D. Action potentials skip between nodes of Ranvier in myelinated axons 1. Junction between axon and adjacent neuron is a synapse 2.
Action potentials cause the release of neurotransmitters when they reach the end of an axon a.
These neurotransmitters are stored in vesicles at the tip of axons 4. When neurotransmitters reach the dendritic receptors on the adjacent neuron, they cause changes in the receptor's plasma membrane, resulting in an action potential 5. Many of these have subtly different effects on the post-synaptic neuron, or may only be found in certain parts of the nervous system 6. Caffeine counteracts the effects of inhibitory neurons i. Evolution of the nervous system A. Remarkable uniformity in structure and function of neurons throughout the animal kingdom 1.