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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 Chemical Bonding

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Chemical Bonding

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Multiple Choice

Which of the following statements about Type IV hypersensitivity reactions is false?

Type IV reactions are mediated by T cells rather than antibodies.

Type IV reactions are also known as delayed-type hypersensitivity reactions.

Type IV reactions typically occur within minutes of exposure to the antigen.

Contact dermatitis is an example of a Type IV hypersensitivity reaction.

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Verified step by step guidance

Understand the nature of Type IV hypersensitivity reactions: These reactions are mediated by T cells, not antibodies, and are known as delayed-type hypersensitivity reactions.

Recognize the timing of Type IV hypersensitivity reactions: Unlike immediate hypersensitivity reactions, Type IV reactions typically occur hours to days after exposure to the antigen.

Identify examples of Type IV hypersensitivity reactions: Contact dermatitis is a common example, where skin inflammation occurs due to contact with certain substances.

Evaluate the statements provided: Compare each statement against the known characteristics of Type IV hypersensitivity reactions.

Determine the false statement: The statement claiming that Type IV reactions occur within minutes of exposure is false, as these reactions are delayed and occur much later.