Action potentials and release of neurohypophysial hormonesin vitro
نویسندگان
چکیده
منابع مشابه
Molecular aspects of neurohypophysial hormone release.
The secretion of hormone from the nerve term inals in the infundibular process of the neurohypophysis is mediated by the arrival of impulses generated in cell bodies of neurons in the anterior hypothalam us and propagated along the fibres of the hypothalamo-hypophysial tract. Influx of Ca2+ into the secretory cells is believed to play a part in hormone release. I t has been proposed th a t Ca2+...
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The essential optical components include a 5 mW polarized laser (HeNe); single mode, polarization preserving optical fiber with couplers; Wollaston prism, birefringent plate; water immersion 20x microscope objective; electro-optic modulator, and polarization analyzer. The interferometric microscope needs to be compact and stiff, a combination that can be achieved with Microbench components (LIN...
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15 صفحه اولThyrotropin-releasing hormone (TRH) inhibits vasopressin and oxytocin release from rat hypothalamo-neurohypophysial explants in vitro.
Incubation of hypothalamo-neurohypophysial explants in Locke's solution containing 28 nM/L thyrotropin-releasing hormone (TRH) resulted in an inhibition of vasopressin and oxytocin secretion during depolarization due to excess potassium. These data suggest the involvement of TRH in the regulatory mechanisms of vasopressin and oxytocin release; the inhibitory effect of TRH cannot be excluded.
متن کاملMembrane Potentials and Action Potentials
Electrical potentials exist across the membranes of virtually all cells of the body. In addition, some cells, such as nerve and muscle cells, are capable of generating rapidly changing electrochemical impulses at their membranes, and these impulses are used to transmit signals along the nerve or muscle membranes. In other types of cells, such as glandular cells, macrophages, and ciliated cells,...
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ژورنال
عنوان ژورنال: The Journal of Physiology
سال: 1971
ISSN: 0022-3751
DOI: 10.1113/jphysiol.1971.sp009499