Abstract
The administration of 3 cc of adrenocortical extract (Upjohn) to adrenalectomized rats fasted at sea-level fails to cause liver glycogen deposition. Such animals under low atmospheric pressure accumulate about 1% liver glycogen. Adrenalectomized-hypophysectomized rats maintained on a minimal dose of hypophyseal extract, given 3 cc of adrenocortical extract and stressed do not deposit liver glycogen. These results suggest that the hypophyseal hormones function not only to control the adrenal cortices under these conditions, but also may contribute directly to the observed carbohydrate alterations. When larger doses of hypophyseal hormones are used there is a significant difference in liver glycogen between the stressed and nonstressed groups indicating the possible implication of still another agent, perhaps insulin, since alloxan diabetic rats do not accumulate liver glycogen in response to low atmospheric pressure.
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