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

21. The Immune System

Introduction to the Immune System

Anatomy & Physiology

21. The Immune System

Introduction to the Immune System

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Multiple Choice

Which pathogen is the most important contributor to biofilms in dental plaque?

Streptococcus mutans

Staphylococcus aureus

Candida albicans

Escherichia coli

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Verified step by step guidance

Understand the concept of biofilms: Biofilms are structured communities of microorganisms encapsulated within a self-produced matrix, adhering to surfaces. In the context of dental plaque, biofilms are complex and involve multiple microbial species.

Identify the role of Streptococcus mutans: Streptococcus mutans is a bacterium that plays a crucial role in the formation of dental plaque biofilms. It is known for its ability to metabolize sugars and produce acid, contributing to tooth decay.

Consider the environment of the oral cavity: The oral cavity provides a unique environment where Streptococcus mutans can thrive due to the presence of dietary sugars, which it ferments to produce lactic acid, leading to demineralization of tooth enamel.

Evaluate the other pathogens: Staphylococcus aureus, Candida albicans, and Escherichia coli are not typically associated with dental plaque biofilms. Staphylococcus aureus is more commonly linked to skin infections, Candida albicans to fungal infections, and Escherichia coli to gastrointestinal issues.

Conclude the most important contributor: Based on the characteristics and environment of the oral cavity, Streptococcus mutans is the most significant contributor to biofilms in dental plaque due to its acidogenic and aciduric properties.