1. You eat a hot dog, leave the bun, describe the physiological response to the increased food in your stomach. Food inters the stomach and it increases the pH and H+ decreases thus the stomach get more basic. The stomach walls are also stretched. Chemoreceptors and stretch receptors detect the change in pH and the stretch on the walls. Nerve impulses travel to the submucosal plexus this stimulates parasympathetic fiber. Waves of peristalsis occur and the flow of gastric juice and from parietal cells begins. This causes secretion of the ho ....