Worksheet Chapter 3: Nutrition

1. 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).

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

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

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

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

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

7. 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.

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

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

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