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

17. The Blood

Erythrocytes

Anatomy & Physiology

17. The Blood

Erythrocytes

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Multiple Choice

What is the primary function of the protein spectrin in erythrocytes?

To allow efficient gas exchange of oxygen and carbon dioxide into and out of erythrocytes.

To maintain the shape of erythrocytes and allow them to change shape when needed.

To make ATP, as there are no mitochondria in erythrocytes.

To hold hemoglobin molecules in place.

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Verified step by step guidance

Understand the role of spectrin: Spectrin is a cytoskeletal protein that is crucial for maintaining the structural integrity of cells, particularly erythrocytes (red blood cells).

Recognize the importance of erythrocyte shape: Erythrocytes need to maintain a biconcave shape to maximize surface area for gas exchange and to be flexible enough to navigate through narrow capillaries.

Identify spectrin's function: Spectrin forms a mesh-like network beneath the plasma membrane of erythrocytes, providing mechanical support and flexibility.

Differentiate from other functions: While spectrin is essential for maintaining cell shape, it does not directly participate in gas exchange, ATP production, or holding hemoglobin in place.

Conclude the primary function: The primary function of spectrin in erythrocytes is to maintain their shape and allow them to change shape when needed, ensuring they can function effectively in the circulatory system.