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 Heart2h 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

The plasma membrane is referred to as a "fluid mosaic" structure. Which of the following statements about that model is true?

The fluid aspect of the membrane is due to the behavior of phospholipids, and the mosaic aspect is due to the presence of carbohydrates.

The fluid aspect of the membrane describes its structure at normal temperatures, and the mosaic aspect describes the behavior of the membrane as the temperature is lowered.

The mosaic aspect of the membrane is due to the glycosylation of phospholipids on the cytoplasmic side of the membrane.

Only phospholipids are capable of moving in the membrane.

The fluid aspect of the membrane is due to the mobility of phospholipids, and embedded proteins account for the mosaic aspect.

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Verified step by step guidance

Understand the fluid mosaic model: The plasma membrane is described as a 'fluid mosaic' because it is composed of a phospholipid bilayer with proteins embedded within it, allowing for fluidity and a mosaic-like pattern.

Identify the fluid aspect: The fluidity of the membrane is primarily due to the movement and flexibility of the phospholipids within the bilayer. These lipids can move laterally, allowing the membrane to be dynamic and flexible.

Identify the mosaic aspect: The mosaic aspect refers to the diverse array of proteins that are embedded within or attached to the phospholipid bilayer. These proteins can move within the lipid bilayer, contributing to the mosaic appearance.

Evaluate the given statements: Analyze each statement to determine which accurately describes the fluid mosaic model. Consider the roles of phospholipids and proteins in the membrane's structure and function.

Determine the correct statement: The correct statement is that the fluid aspect of the membrane is due to the mobility of phospholipids, and the mosaic aspect is due to the presence of embedded proteins, not carbohydrates or glycosylation.