Final answer:
The correct answer to which hormone is released during the gastric phase of stomach regulation due to distension is c) Gastrin, which is important for stimulating the secretion of gastric acid.
Step-by-step explanation:
During the gastric phase of stomach regulation, the distention of the stomach stimulates the release of the hormone gastrin. So, the correct answer is c) Gastrin.
Gastrin plays a crucial role in the digestive process by stimulating the secretion of gastric acid by the parietal cells of the stomach mucosa. This hormone is released in response to food entering the stomach, which helps kickstart the digestion of proteins due to the acidic environment that it creates.