What did sutherland discover about glycogen metabolism in liver cells?

The hormone epinephrine binds to a specific receptor on the plasma membrane of the liver cell.

Explanation:

Glycogen is the body's rapid energy supply, which is how glucose, the main energy source of cells - derived from carbohydrate consumption - is stored. Glycogen is found mainly in muscle (muscle glycogen) and liver (liver glycogen), where liver cells are found.  Glycogen is important for the production of ATP in muscle cells and most other cell types.

Based on this information, researcher Earl Wilbur Sutherland Jr. decided to conduct a study to find out what were the effects of epinephrine during glycogen metabolism on liver cells. In this study, the researcher concluded that during the process of glycogen decomposition into glucose, the epinephrine hormone binds to a specific receptor on the liver cell plasma membrane.

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.