Small modules at the end of axons that release chemicals into the synapse are called

Small modules at the end of axons that release chemicals into the synapse are called

• A. Terminal buttons
• B. Dendrites
• C. Synapses
• D. Nodes of Ranvier

Answer: (A)

In neural communication, the end of an axon releases chemicals into the space between neurons. The structure that does this releasing is the terminal button, also called the axon terminal or synaptic terminal. These tiny bulges hold synaptic vesicles filled with neurotransmitters. When an action potential arrives, calcium ions trigger the vesicles to fuse with the presynaptic membrane and spill neurotransmitters into the synaptic cleft, where they bind to receptors on the next cell to continue the signal. Dendrites are the parts that receive signals, not release them; synapses are the junctions between neurons; and nodes of Ranvier are gaps in the myelin sheath that help speed up electrical conduction.

In neural communication, the end of an axon releases chemicals into the space between neurons. The structure that does this releasing is the terminal button, also called the axon terminal or synaptic terminal. These tiny bulges hold synaptic vesicles filled with neurotransmitters. When an action potential arrives, calcium ions trigger the vesicles to fuse with the presynaptic membrane and spill neurotransmitters into the synaptic cleft, where they bind to receptors on the next cell to continue the signal. Dendrites are the parts that receive signals, not release them; synapses are the junctions between neurons; and nodes of Ranvier are gaps in the myelin sheath that help speed up electrical conduction.