Abstract
Summary
1. Groups of hypophysectomized rats were given 5 mg of cortisone — .3 mg TSH daily for 10 days. Measurements of thyroid cell height were made. 2. The average thyroid cell height was 4.1 μ in the hypophysectomized controls. 4.3 μ in the cortisone treated rats, 8.0 μ in the rats treated with TSH, and 9.0 μ in the animals which received both TSH and cortisone. 3. It is concluded that cortisone, under the conditions of the experiment, did not block and probably even slightly enhanced the effect of TSH on the thyroid.
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