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 test is commonly used to distinguish between staphylococci and streptococci in a laboratory setting?

Catalase test

Oxidase test

Gram stain

Coagulase test

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Verified step by step guidance

Understand the characteristics of staphylococci and streptococci: Staphylococci are catalase-positive, meaning they produce the enzyme catalase, while streptococci are catalase-negative.

Learn about the catalase test: This test involves adding hydrogen peroxide to a bacterial culture. If bubbles form, it indicates the presence of catalase enzyme, which breaks down hydrogen peroxide into water and oxygen.

Recognize the purpose of the catalase test: It is used to differentiate between catalase-positive staphylococci and catalase-negative streptococci.

Consider other tests: The oxidase test, Gram stain, and coagulase test are used for different purposes. The oxidase test identifies bacteria that produce cytochrome c oxidase, the Gram stain differentiates bacteria based on cell wall properties, and the coagulase test identifies Staphylococcus aureus specifically.

Conclude that the catalase test is the most appropriate test to distinguish between staphylococci and streptococci based on their catalase activity.