1. Why is it advantageous for hibernating animals to have thermogenin in the mitochondria of special fat cells that surround arteries bringing blood to the brain?
2. Explain why different mitochondrial shuttle systems in liver and muscle cells result in the generation of 5 ATP and 3 ATP, respectively, by oxidative phosphorylation in the mitochondria for every 2 NADH that are produced in the cytosol by glycolysis.