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Synaptic versicles -- sphere-like structures that store and release neurotransmitters such as dopamine and serotonin, are found in the presynaptic terminals of neurons.

Compline is a simple service, including a confession of sins, one or more psalms, a short reading from scripture, versicles and responses, the Lord’s Prayer, and the canticle Nunc Dimittis.

Although lessons drawn from the saint’s vita are inserted between the matins responsories, minor prayers and versicles are omitted, as are all but the first couple of verses of psalms and canticles.

These versicles are said to be extracts from a letter.

Intōn′ing, a modern popular term for the utterance in musical recitative of the versicles, responses, collects, &c. of the Anglican liturgy.