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

2. Cell Chemistry & Cell Components

Cell Junctions

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Cell Junctions

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Multiple Choice

Your intestine is lined with individual cells. No fluids leak between these cells from the gut into your body. Why?

The intestinal cells are fused together into one giant cell.

The intestinal cells are bound together by plasmodesmata.

The intestinal cells are bound together by gap junctions.

The intestinal cells are bound together by the extracellular matrix.

The intestinal cells are bound together by tight junctions.

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Verified step by step guidance

Understand the function of the intestinal lining: The primary role of the intestinal lining is to act as a barrier that regulates the passage of substances between the gut and the rest of the body.

Identify the structures that prevent fluid leakage: In the context of cellular anatomy, tight junctions are specialized connections between adjacent cells that create a seal, preventing the passage of fluids and most molecules between the cells.

Differentiate between the options: Analyze each option provided in the problem to determine which structure is responsible for preventing fluid leakage.

Evaluate the role of tight junctions: Tight junctions are protein complexes that form a barrier in epithelial tissues, such as the intestinal lining, ensuring that substances must pass through the cells rather than between them.

Conclude with the correct answer: Based on the understanding of tight junctions and their function, recognize that the correct answer is that the intestinal cells are bound together by tight junctions, preventing fluid leakage.