Changes in the T4/T3 molar ratio following thyrotrophin releasing hormone injection in cattle |
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| Authors: | A B Ślebodziński A L C Wallace |
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| Institution: | (1) Department of Experimental Pathology of Animals, Polish Academy of Sciences, ul Grunwaldyka 250, 60-166 Poznan, (Poland);(2) Division of Animal Production, CSIRO, 2148 Prospect, N. S. W., (Australia) |
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| Abstract: | Summary The injection of thyrotropin releasing hormone into cattle resulted in a rapid decrease in the T4/T3 molar ratio. 2 breeds of cattle, Shorthorn and Africander Cross were studied. The decrease in the T4/T3 molar ratio was significantly greater in the Shorthorn breed. It is concluded that acute stimulation of the thyroid gland with TRH results in enhanced release of both T3 and T4 and that T3 is discharged more rapidly than T4. |
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