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  • Title: [Morphometric studies on the cells of the supraoptic and the paraventricular nuclei of milked and unmilked cows].
    Author: Schneider B.
    Journal: Z Mikrosk Anat Forsch; 1975; 89(3):527-49. PubMed ID: 1241729.
    Abstract:
    By morphometric methods the quantitative changes of cell, cytoplasm, nucleus, nucleolus and also of the contents of secretes from the neurosecreting cells of the N.S.O. (Pars parvocellularis and Pars magnocellularis) and N.P.V. from unmilked and milked cows was investigated. This single parameters change in N.S.O. and N.P.V. approximately in the same rhythm. The nucleus-plasma-relation is only unessential influenced. The cytoplasm of the neurosecreting cells of the N.P.V. from unmilked and milked cows is greater ca 6 once, than the nucleus of this. The cytoplasm of the neurosecreting cells of the N.S.O. is greater ca 5 once. A maximal increase of the size of the single parameters and so the greatest activity were observed in the neurosecreting cells of the N.S.O. and N.P.V. of cows, which were prepared 15 min after milking. 60 min after milking of the cows they reach the initial value. The reaction to the milking stimulus is maximal 3 once greater in the neurosecreting cells of the N.P.V. than in the N.S.O. To the same time after the milking stimulus the contents of secretes is maximal diminished about 10 once in the N.P.V. and about 8 once in the N.S.O. The conception that in the N.P.V. the hormon oxytocin is synthetized, is anew supported.
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