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Animals at the extremes: hibernation and torpor
Animals at the extremes: hibernation and torpor

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Metabolic responses to the lowering of hypothalamic temperature in (a) a euthermic marmot and (b) a hibernating marmot
Figure 35 Metabolic responses to the lowering of hypothalamic temperature (T hy) in (a) a euthermic marmot and (b) a hibernating marmot (Florant and Heller, 1977)

 6.2 The hypothalamus as central regulator