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: Hemoglobin

Anatomy & Physiology

17. The Blood

Erythrocytes: Hemoglobin

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Multiple Choice

How many oxygen molecules are bound to a fully loaded hemoglobin molecule?

Four

One

Two

Six

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Verified step by step guidance

Understand the structure of hemoglobin: Hemoglobin is a protein found in red blood cells responsible for transporting oxygen. It consists of four subunits, each containing a heme group capable of binding one oxygen molecule.

Recognize the binding capacity: Each heme group in the hemoglobin molecule can bind one oxygen molecule. Therefore, a fully loaded hemoglobin molecule can bind a total of four oxygen molecules, one per heme group.

Visualize the process: Imagine the hemoglobin molecule as having four 'slots' for oxygen. When all slots are filled, the hemoglobin is fully saturated with oxygen.

Consider the physiological relevance: In the lungs, hemoglobin binds oxygen, becoming fully saturated, and then transports it to tissues where it releases the oxygen for cellular respiration.

Review the options: Given the structure and function of hemoglobin, the correct answer is that a fully loaded hemoglobin molecule binds four oxygen molecules.