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 is hemoglobin's affinity for oxygen affected by the presence or absence of oxygen?

Hemoglobin's affinity for oxygen decreases as more oxygen molecules bind to it.

Hemoglobin's affinity for oxygen is not influenced by oxygen binding but by carbon dioxide levels.

Hemoglobin's affinity for oxygen increases as more oxygen molecules bind to it.

Hemoglobin's affinity for oxygen remains constant regardless of oxygen binding.

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Verified step by step guidance

Understand the concept of hemoglobin's affinity for oxygen, which refers to how readily hemoglobin binds to oxygen molecules.

Recognize that hemoglobin exhibits cooperative binding, meaning that the binding of one oxygen molecule increases the affinity for subsequent oxygen molecules.

Identify the correct statement: Hemoglobin's affinity for oxygen increases as more oxygen molecules bind to it, due to the cooperative nature of hemoglobin.

Consider the physiological significance of this property, which allows hemoglobin to efficiently load oxygen in the lungs and release it in tissues where it is needed.

Review the Bohr effect, which describes how factors like pH and carbon dioxide levels can also influence hemoglobin's oxygen affinity, but the primary focus here is on the cooperative binding mechanism.