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

15. The Special Senses

Rods, Cones, and Light

Anatomy & Physiology

15. The Special Senses

Rods, Cones, and Light

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Multiple Choice

Where is the greatest concentration of cones located in the human eye?

Fovea centralis

Ciliary body

Optic disc

Peripheral retina

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Verified step by step guidance

Understand the structure of the human eye and the role of photoreceptors: The human eye contains two main types of photoreceptors, rods and cones. Cones are responsible for color vision and function best in bright light.

Identify the regions of the retina: The retina is the light-sensitive layer at the back of the eye, and it contains different regions including the fovea centralis, ciliary body, optic disc, and peripheral retina.

Learn about the fovea centralis: The fovea centralis is a small pit located in the macula of the retina. It is known for having the highest density of cone cells, which allows for sharp central vision.

Differentiate between the fovea centralis and other regions: The ciliary body is involved in lens accommodation and aqueous humor production, not in photoreception. The optic disc is where the optic nerve exits the eye, and it lacks photoreceptors, creating a blind spot. The peripheral retina contains more rods than cones, which are better for low-light vision.

Conclude that the greatest concentration of cones is in the fovea centralis: Based on the understanding of the eye's anatomy and the distribution of photoreceptors, the fovea centralis is the region with the greatest concentration of cones, providing the clearest and most detailed vision.