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

4. Tissues & Histology

Characteristics of Epithelial Tissue

Anatomy & Physiology

4. Tissues & Histology

Characteristics of Epithelial Tissue

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Multiple Choice

The epithelial tissue in the small intestine is specialized to absorb nutrients. Why would tight junctions be important in this function?

Tight junctions allow the cells to transmit ions between cells, allowing the cells of the epithelium to coordinate.

Tight junctions ensure all nutrients are absorbed through epithelial cells, allowing for selective permeabilty.

Tight junctions allow specific molecules such as nutrients to enter the cell more easily.

Tight junctions allow the epithelial cells to sense and recognize specific molecules.

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Verified step by step guidance

Understand the role of epithelial tissue in the small intestine: Epithelial tissue lines the small intestine and is responsible for the absorption of nutrients from digested food into the bloodstream.

Identify the function of tight junctions: Tight junctions are specialized connections between adjacent epithelial cells that create a barrier to prevent the passage of substances between the cells.

Consider the importance of selective permeability: Tight junctions ensure that substances must pass through the epithelial cells rather than between them, allowing the cells to selectively absorb nutrients and regulate what enters the bloodstream.

Analyze how tight junctions contribute to nutrient absorption: By forcing nutrients to pass through the epithelial cells, tight junctions allow these cells to selectively transport essential nutrients while blocking harmful substances.

Conclude the significance of tight junctions in the small intestine: Tight junctions are crucial for maintaining the integrity of the epithelial barrier and ensuring that nutrient absorption is efficient and selective, which is vital for proper digestion and health.