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 achieved by muscle contractions in the small intestine?

Mixing of chyme with digestive enzymes

Production of bile

Secretion of insulin

Absorption of nutrients into the bloodstream

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Verified step by step guidance

Understand the role of the small intestine in digestion: The small intestine is responsible for digestion and absorption of nutrients. It uses muscle contractions to facilitate these processes.

Learn about the types of muscle contractions in the small intestine: The small intestine uses two types of contractions—segmentation and peristalsis. Segmentation helps mix chyme with digestive enzymes, while peristalsis moves the chyme forward.

Focus on the function of segmentation: Segmentation involves localized contractions of circular muscles in the intestinal wall, which mix chyme with digestive enzymes and increase contact with the intestinal lining for absorption.

Eliminate incorrect options: Production of bile occurs in the liver, not the small intestine. Secretion of insulin is a function of the pancreas. Absorption of nutrients is a result of digestion but is not directly achieved by muscle contractions.

Conclude that the correct answer is related to segmentation: Muscle contractions in the small intestine primarily achieve the mixing of chyme with digestive enzymes, which is essential for effective digestion.