Gastric secretions are fluids produced by the stomach that aid in digestion. These secretions include hydrochloric acid, pepsin, and mucus. Hydrochloric acid helps break down food and creates an acidic environment for enzymes to function. Pepsin is an enzyme that specifically digests proteins, while mucus protects the stomach lining from the harsh acidic environment. The production of gastric secretions is regulated by the nervous system and hormones. When food enters the stomach, signals are sent to stimulate the release of these secretions. This process ensures that the stomach can effectively digest food and absorb nutrients, playing a crucial role in the digestive system.