Abstract
SUMMARY This paper gives an account of a re-investigation of the work of Groat (1943, 1944). It shows that, apart from animals dying from extraneous causes, the female ground squirrel in anoestrus, some 5 weeks after adrenalectomy, is in good condition, grows, prefers tap-water, and has electrolyte concentrations in blood and muscle similar to those of control animals. In the absence of the adrenals, new tissue appears in the ovaries and, more rarely, in extra-ovarian sites, and reasons are given for considering it to be adrenocortical both in form and function. The origin of this presumptive adrenocortical tissue and the implications of its formation are discussed.
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