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

Microscopes

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Microscopes

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Multiple Choice

Which knob should not be adjusted when observing a specimen using the high-powered objective on a microscope?

Stage adjustment knob

Fine focus knob

Light intensity knob

Coarse focus knob

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Verified step by step guidance

Understand the function of each knob on a microscope: The coarse focus knob is used for large movements to bring the specimen into general focus, while the fine focus knob is used for small adjustments to sharpen the image.

Recognize the importance of the high-powered objective lens: When using high magnification, precise focusing is crucial to avoid damaging the slide or the lens.

Identify the risk associated with the coarse focus knob: Using the coarse focus knob at high magnification can cause the objective lens to crash into the slide, potentially damaging both the slide and the lens.

Learn the appropriate use of the fine focus knob: At high magnification, the fine focus knob should be used to make small adjustments to achieve a clear image without risking damage.

Conclude that the coarse focus knob should not be adjusted when observing a specimen using the high-powered objective, as it can lead to damage and is not necessary for fine adjustments.