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

Which of the following is one of the main functions of the membrane's phospholipid bilayer?

To synthesize proteins for the cell

To provide a rigid structure to the cell

To generate energy for cellular processes

To facilitate the transport of substances across the membrane

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Verified step by step guidance

Understand the structure of the phospholipid bilayer: The cell membrane is primarily composed of a double layer of phospholipids, with hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward.

Recognize the role of the phospholipid bilayer: The bilayer serves as a selective barrier, allowing certain substances to pass while blocking others, thus facilitating transport across the membrane.

Identify the types of transport: The phospholipid bilayer enables passive transport (such as diffusion and osmosis) and active transport (requiring energy) of substances like ions, nutrients, and waste products.

Differentiate from other cellular functions: While the bilayer is crucial for transport, protein synthesis occurs in ribosomes, and energy generation is primarily a function of mitochondria, not the membrane itself.

Conclude the main function: The primary function of the phospholipid bilayer is to facilitate the transport of substances across the membrane, maintaining homeostasis within the cell.