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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

2. Cell Chemistry & Cell Components

Introduction to Membrane Transport

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Membrane Transport

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Multiple Choice

Which viral receptor is involved in HIV attachment to the host cell?

MHC I

CXCR4

CCR5

CD4

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Verified step by step guidance

Understand that HIV (Human Immunodeficiency Virus) targets specific cells in the human immune system, primarily CD4+ T cells.

Recognize that the initial step in HIV infection involves the virus attaching to the host cell. This attachment is mediated by specific receptors on the surface of the host cell.

Identify the primary receptor that HIV uses to attach to the host cell. In the case of HIV, the virus binds to the CD4 receptor on the surface of T cells.

Note that while CD4 is the primary receptor, HIV also requires co-receptors to successfully enter the host cell. These co-receptors are typically CCR5 or CXCR4, depending on the strain of the virus.

Conclude that the viral receptor involved in the initial attachment of HIV to the host cell is the CD4 receptor, which is crucial for the virus to gain entry into the cell.