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

What property of the phospholipid bilayer allows proteins to move laterally in the membrane?

Thickness

Rigidity

Permeability

Fluidity

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Verified step by step guidance

Understand the structure of the phospholipid bilayer: It consists of two layers of phospholipids with hydrophilic heads facing outward and hydrophobic tails facing inward.

Recognize that the phospholipid bilayer is not a rigid structure; it is dynamic and flexible, allowing for movement within the membrane.

Identify the concept of 'fluidity' in the context of the membrane: Fluidity refers to the ability of lipids and proteins to move laterally within the layer, which is crucial for membrane function.

Consider the role of cholesterol and unsaturated fatty acids: Cholesterol can modulate fluidity by preventing the fatty acid chains from packing too closely, while unsaturated fatty acids introduce kinks that increase fluidity.

Conclude that the property allowing proteins to move laterally in the membrane is fluidity, as it provides the necessary environment for such movement.