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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 Heart2h 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

15. The Special Senses

Inner Layer of the Eyeball

Anatomy & Physiology

15. The Special Senses

Inner Layer of the Eyeball

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Multiple Choice

When focusing on a distant object, the lens is __________.

more concave

unchanged

more convex

more flattened

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Verified step by step guidance

Understand the role of the lens in focusing light onto the retina. The lens changes shape to focus light from objects at different distances.

Recognize that when focusing on distant objects, the eye needs to reduce the refractive power of the lens to allow parallel light rays to focus on the retina.

Recall that a more flattened lens has less curvature, which decreases its refractive power, allowing it to focus light from distant objects.

Consider the action of the ciliary muscles: when focusing on distant objects, these muscles relax, causing the lens to flatten.

Conclude that the lens becomes more flattened when focusing on distant objects, as this shape is optimal for reducing refractive power and focusing parallel light rays.