Abstract
Summary
1. The hyperglycemic effect of lowered barometric pressure (anoxia) on normal rats of different age groups is less in animals subjected to a 4-hour fast than in those fasted for 22 hours. 2. Similar results are obtained for hypophysectomized rats fasted for 4 and 12 hours respectively. 3. In contradistinction to the findings reported in 1 and 2, different durations of fasting have no effect on the vago-insulin system as shown by observations on adreno-demedullated animals.
It is concluded that the reactivity of the sympathetico-adrenal system increases with rising blood sugar level.
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