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 best describes the structure of the plasma membrane?

A double layer of phospholipids with embedded proteins

A rigid layer of cellulose and proteins

A single layer of lipids with scattered carbohydrates

A thick layer of nucleic acids and lipids

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Verified step by step guidance

Understand that the plasma membrane, also known as the cell membrane, is a crucial component of all cells, providing structure and regulating the movement of substances in and out of the cell.

Recognize that the plasma membrane is primarily composed of a phospholipid bilayer. This means it has two layers of phospholipids, with hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward.

Identify that embedded within this phospholipid bilayer are various proteins that serve multiple functions, such as transport, signaling, and structural support.

Note that the plasma membrane is not rigid; it is fluid and flexible, allowing for the movement of proteins and lipids within the layer, which is essential for its function.

Conclude that the correct description of the plasma membrane is 'A double layer of phospholipids with embedded proteins,' as this accurately reflects its structure and composition.