Which factor increases the rate of gastric emptying?

Which factor increases the rate of gastric emptying?

• A. Carbohydrate-rich meals and liquids speed gastric emptying
• B. Fatty meals slow gastric emptying
• C. Large-volume meals speed gastric emptying
• D. Acid in the duodenum and secretin speed gastric emptying

Answer: (A)

Carbohydrate-rich contents move into the small intestine more quickly than fat-containing ones, so the rate of gastric emptying is increased with carbohydrate-rich meals and even with carbohydrate-containing liquids. The stomach doesn’t need to do as much work to pass simple carbohydrates into the duodenum, and liquids can leave the stomach faster than solids. In contrast, fats slow emptying because they require emulsification and digestion, and they trigger hormonal signals (like cholecystokinin) that dampen antral contractions and slow pyloric outflow. Additionally, when the duodenum detects acidic chyme or fat, reflexes and hormones come into play to slow gastric emptying, giving the small intestine time to neutralize acid and handle fats. So the macronutrient composition that favors quicker emptying is carbohydrates, especially in liquid form, compared with fats or high-fat mixtures.

Carbohydrate-rich contents move into the small intestine more quickly than fat-containing ones, so the rate of gastric emptying is increased with carbohydrate-rich meals and even with carbohydrate-containing liquids. The stomach doesn’t need to do as much work to pass simple carbohydrates into the duodenum, and liquids can leave the stomach faster than solids. In contrast, fats slow emptying because they require emulsification and digestion, and they trigger hormonal signals (like cholecystokinin) that dampen antral contractions and slow pyloric outflow. Additionally, when the duodenum detects acidic chyme or fat, reflexes and hormones come into play to slow gastric emptying, giving the small intestine time to neutralize acid and handle fats. So the macronutrient composition that favors quicker emptying is carbohydrates, especially in liquid form, compared with fats or high-fat mixtures.