Neurosecretory axo-axonic synapses in the median eminence of the turtle, Geoclemys reevesii.
Neurosecretory axo-axonic synapses were found in the median eminence of the turtle. Most of the presynaptic axons contain granules approximately 95 nm in diameter, and the postsynaptic elements have granules approximately 110 nm in diameter. The functional significance of axo-axonic synapses in the median eminence is discussed in relation to the discharge of releasing hormones from the axon terminals.
D000818:Animals; D001369:Axons / Q000648:ultrastructure*; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D005260:Female; D007030:Hypothalamo-Hypophyseal System / Q000648:ultrastructure*; D008297:Male; D008473:Median Eminence / Q000648:ultrastructure*; D009490:Neurosecretory Systems / Q000648:ultrastructure; D013569:Synapses / Q000648:ultrastructure*