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

Biological Membranes

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Biological Membranes

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Multiple Choice

The vessels that exhibit the lowest level of permeability are the __________.

venules

sinusoidal capillaries

fenestrated capillaries

continuous capillaries

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Verified step by step guidance

Step 1: Understand the concept of capillary permeability. Capillaries are small blood vessels that allow the exchange of substances between the blood and surrounding tissues. Their permeability depends on the structure of their walls.

Step 2: Learn about the types of capillaries. There are three main types: continuous capillaries, fenestrated capillaries, and sinusoidal capillaries. Each type has different levels of permeability based on its structure.

Step 3: Examine the structure of continuous capillaries. Continuous capillaries have tightly joined endothelial cells with very few gaps, making them the least permeable. They are commonly found in the brain, lungs, and muscles.

Step 4: Compare continuous capillaries to fenestrated and sinusoidal capillaries. Fenestrated capillaries have small pores (fenestrations) that increase permeability, while sinusoidal capillaries have large gaps, making them the most permeable.

Step 5: Conclude that continuous capillaries exhibit the lowest level of permeability due to their tightly joined endothelial cells and lack of fenestrations or large gaps.