Which of the following statements regarding digestion is correct?

• A. The small intestine is the primary site for nutrient absorption.
• B. Digestion begins in the stomach with the secretion of gastric juices.
• C. Saliva contains enzymes that initiate the digestion of proteins.
• D. The large intestine is responsible for the majority of protein digestion.

Answer: (A)

Verified step by step guidance

1. Begin by understanding the process of digestion and the roles of different organs involved. Digestion is the breakdown of food into smaller components that can be absorbed into the bloodstream.
2. Identify the primary site for nutrient absorption. The small intestine is the main organ where most nutrient absorption occurs, including carbohydrates, proteins, and fats.
3. Examine the role of the stomach in digestion. Digestion begins in the mouth, not the stomach. The stomach primarily breaks down proteins using gastric juices, but it is not the starting point of digestion.
4. Consider the function of saliva. Saliva contains enzymes like amylase that begin the digestion of carbohydrates, not proteins.
5. Evaluate the role of the large intestine. The large intestine is mainly involved in water absorption and the formation of feces, not protein digestion.