4 a] Explain the Architecture of Rod and Cone Cells with neat diagram
Cone Cells:
- Function: Cone cells are responsible for color vision in bright light conditions. They allow us to view a wide range of colors and provide sharper, high-resolution images.
- Structure: Cone cells have a tapered shape and contain different types of light-sensitive pigments that respond to specific wavelengths of light, corresponding to the colors blue, green, and red.
- Density: There are approximately 6 to 7 million cone cells in the human retina.
- Visual Acuity: Cones have high visual acuity, allowing them to resolve fine details.
Rod Cells:
- Function: Rod cells are responsible for vision in low-light conditions, providing us with black-and- white, or grayscale, vision. They are highly sensitive to light and allow us to see in dim environments.
- Structure: Rod cells are cylindrical cells with a stacked arrangement of membranous disks containing light-sensitive pigments.
- Density: There are approximately 90 to 120 million rod cells in the human retina.
- Visual Acuity: Rods have lower visual acuity compared to cones, meaning they cannot distinguish fine details as effectively.
- The electrical signals generated by the rods and cones are further processed After the processed signals are transmitted to the brain.
