Which mechanism causes a groundhog's body temperature to increase as it exits hibernation?

💡 Explanation

When a groundhog exits hibernation, brown fat thermogenesis activates, converting energy into heat by uncoupling oxidative phosphorylation, raising metabolic rate and body temperature. Therefore brown fat thermogenesis results, rather than panting, vasoconstriction, or shivering which are mechanisms for controlling temperature in active animals.

• Which consequence arises when a moth employs 'phantom' echoes against the sonar of an attacking bat?
• Which mechanism buffers rapid pressure changes during avian flight?
• Which risk increases when reduced air sac pressure causes asynchronous breathing during thermal soaring?
• Which outcome occurs under thermal updraft conditions when contour feathers fail to properly overlap during albatross soaring?
• Which consequence happens if plant transpiration reduces in mangrove habitats experiencing high salinity and humidity?
• Which constraint causes greater noctuid moth mortality when higher-frequency bat calls occur?