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

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 is true regarding prion proteins?

Prion proteins are beneficial to the immune system by enhancing antibody production.

Prion proteins contain nucleic acids that allow them to replicate.

Prion proteins are infectious agents composed entirely of protein.

Prion proteins are a type of virus that affects the immune system.

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Verified step by step guidance

Understand the nature of prion proteins: Prions are unique infectious agents composed entirely of protein, without any nucleic acids, which distinguishes them from viruses and bacteria.

Recognize the role of prion proteins: Unlike viruses, prions do not contain nucleic acids, so they cannot replicate in the traditional sense. Instead, they propagate by inducing abnormal folding of normal cellular proteins, particularly in the brain.

Clarify the misconception about prion proteins and the immune system: Prion proteins do not enhance antibody production or benefit the immune system. In fact, they are known for causing neurodegenerative diseases such as Creutzfeldt-Jakob disease.

Differentiate prion proteins from viruses: Prions are not viruses. Viruses contain genetic material (DNA or RNA) and can affect the immune system, whereas prions are solely protein-based and affect the nervous system.

Identify the correct statement: The true statement regarding prion proteins is that they are infectious agents composed entirely of protein, which is a key characteristic of prions.