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

Introduction To Blood

Anatomy & Physiology

17. The Blood

Introduction To Blood

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Multiple Choice

Red blood cells (RBCs) are characterized by which of the following?

They contain large numbers of mitochondria

They lack a nucleus in their mature form

They are the largest cells in the blood

They are responsible for initiating blood clotting

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Verified step by step guidance

Understand the structure and function of red blood cells (RBCs). RBCs are specialized cells in the blood responsible for transporting oxygen and carbon dioxide.

Recall that mature RBCs lack a nucleus and most organelles, including mitochondria, to maximize space for hemoglobin, the protein responsible for oxygen transport.

Eliminate the incorrect options: RBCs do not contain large numbers of mitochondria because they rely on anaerobic metabolism for energy. They are not the largest cells in the blood; white blood cells are generally larger. RBCs are not responsible for initiating blood clotting; platelets perform this function.

Focus on the correct characteristic: Mature RBCs lack a nucleus, which is a defining feature that allows them to carry more hemoglobin and efficiently transport oxygen.

Conclude that the correct answer is: 'They lack a nucleus in their mature form,' as this is the most accurate description of RBCs among the given options.