Which process inhibits skeletal muscle atrophy during prolonged hibernation in arctic ground squirrels?

💡 Explanation

When squirrels hibernate, they minimize energy expenditure via metabolic suppression; branched-chain ketoacid dehydrogenase activity decreases because it regulates branched-chain amino acid catabolism used for energy, limiting muscle protein breakdown. Therefore reduced BCKDH activity results, rather than enhanced mitochondrial fusion, increased synthesis, or elevated degradation which are inhibited by lower energy demands.

• Which outcome reduces a cheetah's successful hunt rate due to high-speed muscle fatigue?
• Which consequence results when a mature tree experiences prolonged drought-induced cavitation?
• Which process allows marine birds drinking seawater to avoid osmotic imbalance?
• Which aerodynamic disadvantage is increased in birds soaring at very high altitudes due to reduced air density?
• Which effect results when migratory birds extensively use thermal lift?
• Which outcome occurs when water availability decreases and xylem sap's osmotic pressure gradients change within a plant’s root system undergoing transpiration?