Nokea
Which vitamin is produced by intestinal bacteria?
- A. B12
- B. A
- C. C
- D. D
Correct Answer: A
Rationale: Intestinal bacteria synthesize vitamin B12, which is absorbed in the ileum with intrinsic factor. Vitamins A, C, and D are not produced by gut bacteria.
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The splitting of fat globules into glycerol and fatty acids is handled by the enzyme
- A. sucrase
- B. amylase
- C. lipase
- D. trypsin
Correct Answer: C
Rationale: Lipase is the enzyme that breaks down fats into glycerol and fatty acids during digestion.
Match each term with the correct description: produces enzymes
- A. rectum
- B. esophagus
- C. pancreas
- D. liver
Correct Answer: C
Rationale: The pancreas produces digestive enzymes that aid in breaking down food.
Which of the following vitamins helps in the maturation of red blood cells?
- A. Vitamin D.
- B. Vitamin A.
- C. Vitamin B12.
- D. Vitamin B.
Correct Answer: C
Rationale: Vitamin B12 is essential for the maturation of red blood cells and DNA synthesis.
Which part of the digestion process speeds up the break down of food?
- A. enzymes
- B. peristalsis
- C. villi
- D. bile
Correct Answer: A
Rationale: Enzymes are biological catalysts that accelerate the chemical breakdown of food.
An important function of the intestinal villi is to:
- A. increase the surface area for absorption of nutrients
- B. move chyme along the alimentary canal
- C. form a protective covering for the alimentary canal
- D. synthesise amino acids
Correct Answer: A
Rationale: Intestinal villi are finger-like projections that vastly increase the surface area of the small intestine for nutrient absorption.