Question

Which best describes the physical and chemical digestion of food?

Physical and chemical digestion occur in the mouth; only chemical digestion occurs in the small intestine.
Physical and chemicall digestion occur in the small intestine; only chemical digestion occurs in the mouth.
Only physical digestion occurs in the stomach; chemical and physical digestion occur in the large intestine.
Only physical digestion occurs in the large intestine; physical and chemical digestion occur in the stomach.

Answer 1

Physical and chemical digestion occur in the mouth; only chemical digestion occurs in the small intestine.

Explanation: The mouth performs both mechanical (chewing) and chemical (salivary enzymes) digestion. The small intestine is the main site of chemical digestion (pancreatic enzymes, brush border enzymes, bile); while it also has mixing movements, its primary role is chemical digestion and nutrient absorption, so option A is the best choice.