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

What molecule binds to the heme group on the hemoglobin molecule?

Nitrogen

Carbon Dioxide

Oxygen

Glucose

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Verified step by step guidance

Understand the structure of hemoglobin: Hemoglobin is a protein found in red blood cells, composed of four subunits, each containing a heme group.

Recognize the role of the heme group: The heme group contains an iron ion (Fe²⁺) at its center, which is crucial for binding gases.

Identify the primary function of hemoglobin: Hemoglobin's main role is to transport oxygen from the lungs to tissues throughout the body.

Determine which molecule binds to the heme group: Oxygen (O₂) binds to the iron ion in the heme group, allowing hemoglobin to carry oxygen.

Consider other molecules: While carbon dioxide (CO₂) can bind to hemoglobin, it does not bind to the heme group but rather to the protein portion of hemoglobin. Nitrogen and glucose do not bind to the heme group.