Final answer:
Hydrochloric acid, water, pepsin, and mucous are all components of gastric juice. Pancreatic juice, which contains bicarbonate, neutralizes the acidic chyme from the stomach to aid digestion in the small intestine.
Step-by-step explanation:
The components hydrochloric acid, water, pepsin, and mucous are collectively part of gastric juice. Gastric juice is a mixture of substances essential for digestion within the stomach. Concerning the neutralization of the highly acidic chyme that exits the stomach and enters the small intestine, it is the bicarbonate in pancreatic juice that neutralizes this acidity. The pancreas secretes digestive juices that contain high levels of bicarbonate, which serves to buffer the acidic chyme, making it more suitable for further digestion in the small intestine. Additionally, pancreatic juice is rich in enzymes necessary for the digestion of proteins and carbohydrates.