THE CONNECTIVE TISSUE OF THE FROG SCIATIC NERVE
نویسندگان
چکیده
منابع مشابه
AC impedance of the perineurium of the frog sciatic nerve.
The AC impedance of the isolated perineurium of the frog sciatic nerve was examined at frequencies from 2 Hz to 100 kHz. A Nyquist plot of the imaginary and real components of the impedance demonstrated more than 1 capacitative element, and a DC resistance of 478 +/- 34 (SEM, n = 27) omega cm2. Transperineurial potential in the absence of externally applied current was 0.0 +/- 0.5 mV. The imped...
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a) In mammals, large peripheral nerves, for example the vagus, the sciatic and the ulnar typically are bundles of thousands of individual axons enclosed in a loose connective tissue sheath, the Epineurium. Within the Epineurium, the axons are grouped in fascicles, encased in a more structured epithelial sheath (the perineurium). Each axon is surrounded by a thin connective tissue sheath, the en...
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Biology has been always a descriptive science. The great variety and number of living systems have been enough to occupy the major time of investigators until the rise of the experimental method resulted in the examination, in greater detail, of individual systems. Even here, however, the descriptive method dominated the science. Processes and mechanisms have been described and, with the improv...
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Desheathed frog (R. pipiens) sciatic nerves were soaked in Na-deficient solutions, and measurements were made of their Na and K contents and of the movements of K(42). When a nerve is in Ringer's solution, the Na fluxes are equal to the K fluxes, and about 75 per cent of the K influx is due to active transport. The Na content and the Na efflux are linearly related to the Na concentration of the...
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Desheathed frog (R. pipiens) sciatic nerves were soaked in solutions that contained ouabain or NaN(3), in K-free solutions, or in K- and Ca-free solutions. Then, the nerves were allowed to recover in standard Ringer's solution. At various times during the soaking periods, some nerves were analyzed for Na and K, and estimates were made of the influx and efflux of Na(22). While a nerve was soakin...
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ژورنال
عنوان ژورنال: Quarterly Journal of Experimental Physiology and Cognate Medical Sciences
سال: 1954
ISSN: 0033-5541
DOI: 10.1113/expphysiol.1954.sp001048