ULTRASTRUCTURES AND THEIR RELATIONSHIPS OF THE NEUROHYPOPHYSIS IN THE RAT
- VernacularTitle:大白鼠神经垂体的超微结构及其联系
- Author:
Changgeng ZHU
;
Qingying LIU
;
Jinhuo LU
;
Aqing CHEN
;
Ying WEI
;
Hanlin PENG
- Publication Type:Journal Article
- Keywords:
Neurohypophysis;
Synapse;
Pituicyte;
Neurosecretion
- From:
Acta Anatomica Sinica
1955;0(03):-
- CountryChina
- Language:Chinese
-
Abstract:
Ultrastructures of the neurohypophysis in the rats have been studied by means of electron microscopy. Besides identifying the fact that the neurosecretory substances store in the nerve terminals and release into the blood, there are also axo-axonic synaptoid structures existed between neurosecretory terminals and neuro-glial synaptoid contacts between neurosecretory terminals and pituicytes. The characteristics of these contacts mentioned above are as follows: (1) the pre-and postsynaptic membranes are insignificantly thickened; (2) clustered microvesicles are close to and attach to the presynaptic membrane; (3) the synaptic cleft is about 20 nm wide and contains various amount of electron dense materials. The authors suggest that the two kinds of synaptoid structures and pituicytes are all involved in the regulation for the releasing of the neurosecretory substances.
