Final answer:
C) Insulin is the hormone responsible for regulating blood glucose levels, aiding in the uptake and storage of glucose in the body's tissues.
Step-by-step explanation:
Insulin is the hormone that regulates the amount of glucose in the bloodstream. It is secreted by the pancreas when blood glucose levels rise after eating. Insulin facilitates the uptake of glucose into liver, fat, and muscle cells, converting it to glycogen or fat for storage. During periods of low blood glucose, insulin secretion decreases, allowing blood glucose levels to stabilize. In contrast, other substances like bicarbonate help buffer chyme, amylase is involved in digesting carbohydrates, and bile is essential in fat digestion by emulsifying lipids in the small intestine.