Parathyroid Gland of the Frog Rana Tigrina
نویسنده
چکیده
The parathyroid gland of Rana tigrina is composed of closely packed epithelial cells which are arranged in whorls. A difference in the density of the parathyroída1 cells has been noticed. Cells in the center of the gland are packed compactly possessing elongated nuclei and denser cytoplasm. The cells at periphery of the gland are loosely arrenged having lightly stained cytoplasm and large spherical nuclei.
منابع مشابه
Tissue catecholamines in Rana tigrina and effects of reserpine.
Reserpine depletes tissue catecholamine contents (CAs) in mammals (1, 2) but may (3, 4, 5) or may not (6) affect the CA stores of cold-blooded animals such as the turtle, frog and toad. Doses as high as 50 mg/kg for 3 days failed to decrease toad tissue CAs (6), which were, however, reported to be sensitive to much lower doses if the ambient temperature was high (7). However, no reference to th...
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