Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

23. The Digestive System

Introduction to the Digestive System

Anatomy & Physiology

23. The Digestive System

Introduction to the Digestive System

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Multiple Choice

Which of the following is true of bacteria in the large intestine?

They secrete insulin to regulate blood sugar levels.

They produce bile for fat digestion.

They are primarily responsible for protein digestion.

They aid in the digestion of cellulose.

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Verified step by step guidance

Begin by understanding the role of bacteria in the large intestine. Bacteria in the large intestine are part of the gut microbiota, which plays a crucial role in digestion and overall health.

Consider the functions of the large intestine. It is primarily involved in absorbing water and electrolytes, forming and storing feces, and housing a large number of bacteria that aid in digestion.

Evaluate the options given in the problem. Insulin secretion, bile production, and protein digestion are not functions of bacteria in the large intestine. Insulin is secreted by the pancreas, bile is produced by the liver, and protein digestion primarily occurs in the stomach and small intestine.

Focus on the correct option: 'They aid in the digestion of cellulose.' Bacteria in the large intestine help break down cellulose, a complex carbohydrate found in plant cell walls, which humans cannot digest on their own.

Conclude by recognizing the importance of bacterial fermentation in the large intestine. This process helps in breaking down undigested carbohydrates like cellulose, producing short-chain fatty acids that can be absorbed and used by the body.