摘要
尼罗罗非鱼神经垂体存在A_1、A_2和B型神经分泌纤维,其终端与腺细胞、毛细血管、组织间隔、基板或脑垂体细胞形成直接轴——腺突触联系、间接轴——腺联系和直接轴——脑垂体细胞突触联系,构成下丘脑对脑垂体腺细胞支配的三种联系形式。在神经垂体组织中还存在Ⅰ型和Ⅱ型两种结构和功能不同的脑垂体细胞。
Three types of neurosecretory fibres and their terminals have been recognized in neuro-hypophysis of Tilapia nilotica. Types A1 and A2 fibres contain granules of 140-200 nm and 100-160 nm in diameter respectively. Type B fibres have granules of 50-100 nm and agranular vesicles of 40-60 nm in diameter. All of types neurosecretory terminals make contact with the gland cells or end close to the capillaries, connective tissue septa, basal lamina or pituicytes: a. Direct axo-glandular synaptoid contacts; b. Indirect axo-glandular contacts; c. Direct axo-pituicyte synaptoid contacts. In addition, two pituicytes (type Ⅰ and type Ⅱ) were recognized in the neurohypophysial tissue.
出处
《动物学报》
SCIE
CAS
CSCD
1990年第4期352-359,共8页
ACTA ZOOLOGICA SINICA
关键词
尼罗罗非鱼
神经垂体
超微结构
Uktrastructure
Neurohypophysis
Neurosecretory fibres
Pituicytes
Tilapia nilotica
