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

Small Intestine

Anatomy & Physiology

23. The Digestive System

Small Intestine

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Multiple Choice

Which of the following statements are true about motility in the small intestine:
I. Peristalsis will generally propel chyme towards the ileocecal valve.
II. The efficiency of chemical digestion can be increased through segmentation.
III. Peristalsis and segmentation use the same muscles, but contract in different patterns.

I only.

II only.

I & II.

I & III.

II & III.

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Verified step by step guidance

Understand the concept of peristalsis: Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. In the small intestine, peristalsis helps propel chyme towards the ileocecal valve, which is the junction between the small intestine and the large intestine.

Understand the concept of segmentation: Segmentation involves contractions of the circular muscles in the digestive tract, which helps mix the chyme and increase the efficiency of chemical digestion by bringing it into contact with digestive enzymes and the absorptive surfaces of the intestine.

Analyze statement I: Peristalsis will generally propel chyme towards the ileocecal valve. This statement is true because peristalsis is responsible for moving the contents of the small intestine towards the large intestine.

Analyze statement II: The efficiency of chemical digestion can be increased through segmentation. This statement is true because segmentation enhances the mixing of chyme with digestive juices, improving digestion and nutrient absorption.

Analyze statement III: Peristalsis and segmentation use the same muscles, but contract in different patterns. This statement is true because both processes involve the smooth muscles of the intestine, but they contract in different patterns to achieve different functions.