Date of Award


Document Type


Degree Name

Master of Science

Degree Discipline



In Rana niniens. thyroid-dependent growth of the hind limbs is not seen until 5 to 7 weeks after feeding begins (Kollros, 1959). Although thyroid hormone is being secreted, the level of circulating hormone is not sufficient to bring about a response. Some tissues fail to respond to thyroid hormone even after huge exogenous doses have been administered, which has been demonstrated by Kaltenbach (1953), with the use of thyroxine-cholesterol pellet implants, found local tissue responses independent of general systemic effects.

The purpose of this study is two fold: (1) to establish the time at which the normal development of the chondrocranium is completed, and (2) to determine whether the rate of chondrocranium development can be accelerated by administering large doses of exogenous hormone.

Committee Chair/Advisor

E. W. Martin

Committee Member

J. E. Berry

Committee Member

P. L. Young

Committee Member

C. E. Urdy

Committee Member

C. L. Ward


Prairie View A&M College


© 2021 Prairie View A & M University

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Date of Digitization


Contributing Institution

John B Coleman Library

City of Publication

Prairie View




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