Question

The ______ is the site of complete digestion of carbohydrates, proteins and fats in the human body.
1. pharynx
2. stomach
3. small intestine
4. large intestine

Answer 1

Correct Answer - Option 3 : small intestine

The correct answer is the small intestine.

• Complete digestion of Carbohydrates, proteins, and fats takes place in the small intestine in the human body. 

• In the small intestine, they are broken down into their basic units by different digestive enzymes.
  • Carbohydrates break into glucose, fructose by the enzyme amylase.
  • Proteins into amino acids by proteases. 
  • Fats into fatty acids and glycerol by lipase enzyme.
  • Absorption of water and electrolytes;

• Absorption of water and electrolytes takes place in the Large Intestine. 
• The pharynx is a common passageway for food, air, and water from the nasal cavity and oral cavity.