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 an accurate statement regarding the cell membrane?

The cell membrane is a rigid structure that does not allow any substances to pass through.

The cell membrane is composed primarily of a phospholipid bilayer with embedded proteins.

The cell membrane is impermeable to all ions and molecules.

The cell membrane is made entirely of carbohydrates and nucleic acids.

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Verified step by step guidance

Understand the basic structure of the cell membrane: The cell membrane, also known as the plasma membrane, is primarily composed of a phospholipid bilayer. This bilayer forms the fundamental structure of the membrane.

Recognize the role of embedded proteins: Within the phospholipid bilayer, there are various proteins embedded. These proteins serve multiple functions, including acting as channels and receptors, facilitating communication and transport across the membrane.

Clarify the permeability of the cell membrane: The cell membrane is selectively permeable, meaning it allows certain substances to pass through while restricting others. This selective permeability is crucial for maintaining homeostasis within the cell.

Identify the incorrect statements: The cell membrane is not a rigid structure; it is flexible and dynamic. It is not impermeable to all ions and molecules, nor is it made entirely of carbohydrates and nucleic acids.

Conclude with the correct statement: The accurate description of the cell membrane is that it is composed primarily of a phospholipid bilayer with embedded proteins, which allows it to perform its essential functions.