Final answer:
Proteins are not the quickest macronutrient to empty from the stomach. Protein digestion takes time and involves the action of gastric juices and enzymes. It is a slower process compared to the digestion of carbohydrates and fats.
Step-by-step explanation:
False. Proteins are not the quickest macronutrient to empty from the stomach. In fact, proteins take longer to digest compared to carbohydrates and fats. Protein digestion begins in the stomach where hydrolysis of the protein linkages occurs with the action of gastric juices and the enzyme pepsin. Protein digestion is completed in the small intestine, where other protein-digesting enzymes are involved. This process takes time and is not as quick as the digestion of carbohydrates and fats.