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Nature & Animals

Which process is most directly suppressed once a hibernating bear enters a state of torpor?

A)Urea cycle for nitrogen excretion
B)Red blood proliferation in marrow
C)White fat catabolism for energy
D)Brown fat thermogenesis for heat

💡 Explanation

Once a bear enters torpor, further cycles of induced arousal are energetically expensive, and brown fat thermogenesis stops because noradrenaline signaling is surpressed, minimizing metabolic activity and therefore basal consumption. Therefore brown fat thermogenesis is suppressed, rather than others which continue at low rates until arousal events force a response.

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