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

Consider the currently accepted fluid mosaic model of the plasma membrane. Where in the membrane would carbohydrates most likely be found?

In the interior of the membrane

On the inside (cytoplasmic) surface of the membrane

On both hydrophilic surfaces of the membrane but not in the hydrophobic interior

Carbohydrates are rarely associated with plasma membranes.

On the outside (external) surface of the membrane

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Verified step by step guidance

Understand the fluid mosaic model: The plasma membrane is composed of a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates. The 'mosaic' aspect refers to the diverse components that float in or on the fluid lipid bilayer.

Identify the role of carbohydrates in the membrane: Carbohydrates are typically attached to proteins (glycoproteins) or lipids (glycolipids) on the extracellular surface of the plasma membrane.

Recognize the location of carbohydrates: Carbohydrates are found on the external surface of the plasma membrane, where they play a crucial role in cell recognition and communication.

Consider the hydrophilic and hydrophobic regions: The hydrophilic (water-attracting) regions of the membrane are on the outside and inside surfaces, while the hydrophobic (water-repelling) region is in the interior. Carbohydrates are hydrophilic and thus are located on the external surface.

Conclude the correct location: Based on the fluid mosaic model and the role of carbohydrates, they are most likely found on the outside (external) surface of the membrane, facilitating interactions with the external environment.