1. The liver is an organ that plays important roles in multiple organ systems. What role does the liver play in digestion? What role does it play in excretion? 2. A cell in your body breaks down an...

1. The liver is an organ that plays important roles in multiple organ systems. What role does the liver play in digestion? What role does it play in excretion?

2. A cell in your body breaks down an amino acid to make ATP and generates a molecule of ammonia, a nitrogencontaining waste. Describe what happens to this ammonia molecule.