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

When using a microscope, which focus knob should you use first to locate your specimen?

Stage adjustment knob

Fine focus knob

Coarse focus knob

Light intensity knob

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Verified step by step guidance

Begin by understanding the function of each focus knob on a microscope. The coarse focus knob is used for making large adjustments to the focus, while the fine focus knob is used for smaller, precise adjustments.

When you first place a slide on the stage of the microscope, the specimen may not be in focus. The coarse focus knob is designed to quickly bring the specimen into the general focus range.

Turn the coarse focus knob slowly while looking through the eyepiece. This will move the stage up and down, allowing you to locate the specimen by bringing it into the field of view.

Once the specimen is visible, you can switch to the fine focus knob to make small adjustments and sharpen the image for better clarity.

Remember, the stage adjustment knob is used to move the slide horizontally or vertically, and the light intensity knob adjusts the brightness of the light source, but neither is used for focusing the specimen initially.