Final answer:
The hormone gastrin matches with the description of stimulating gastric motility and secretion, primarily by promoting the secretion of gastric acid. This action begins during the gastric phase when food reaches the stomach.
Step-by-step explanation:
The hormone involved in gastric secretion that must be matched to its description is gastrin. The correct match for gastrin, based on its function in gastric secretion, is as follows:
- Gastrin: Stimulates gastric motility and secretion.
Gastrin specifically stimulates the secretion of gastric acid by the parietal cells of the stomach mucosa. The gastric phase, which is part of the process of digestion and involves gastrin, begins when food reaches the stomach.
Hormonal controls such as gastrin, secretin, cholecystokinin (CCK), and gastric inhibitory peptide play crucial roles in managing the digestive process.