Worksheet Chapter 3: Nutrition

1. Explain TWO structural adaptations of the small intestine that increase the efficiency of nutrient absorption.

2. True or False: Lacteals located in the villi absorb amino acids and glucose directly into the bloodstream.

3. Fill in the blank: Rhythmic, wave-like muscular contractions that push food along the alimentary canal are called ________.

4. A sample of food contains 10 g of Carbohydrate (17 kJ/g), 5 g of Protein (17 kJ/g), and 2 g of Fat (37 kJ/g). Calculate the total energy value of this food sample in kilojoules (kJ).

5. Which vitamin deficiency leads to soft bones in children, known as rickets?

6. State TWO functions of hydrochloric acid in the stomach.

7. True or False: Bile is an enzyme that chemically digests fats into fatty acids and glycerol.

8. Explain the process of assimilation for (a) Glucose and (b) Amino acids once they reach body tissues.

9. Name the three main digestive enzymes present in pancreatic juice and state their respective substrates.

10. A student eats a lunch consisting of plain white rice and fried chicken. Trace the chemical digestion of the protein component in this meal from the mouth until absorption.