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During the mechanism of vision, the cell...

During the mechanism of vision, the cells which generate the first potential on stimulation be light is/are:

A

Road and cones

B

Bipolar neurons

C

Optic nerve

D

Ganglion cells

Text Solution

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The correct Answer is:
To solve the question regarding which cells generate the first potential upon stimulation by light during the mechanism of vision, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Structure of the Eye**: - The eye consists of three main layers: the outer layer (sclera), the middle layer (choroid), and the inner layer (retina). **Hint**: Remember the three layers of the eye and their functions. 2. **Identifying the Inner Layer**: - The inner layer of the eye is the retina, which contains three types of neural cells: ganglion cells, bipolar cells, and photoreceptor cells. **Hint**: Focus on the types of cells present in the retina. 3. **Recognizing Photoreceptor Cells**: - Photoreceptor cells are specialized cells that respond to light. There are two main types: rods and cones. Rods are responsible for twilight vision, while cones are responsible for daylight vision. **Hint**: Recall the functions of rods and cones in vision. 4. **Determining the Role of Photoreceptor Cells**: - Photoreceptor cells (rods and cones) are the first cells in the visual pathway that generate an electrical potential when stimulated by light. This is due to the photopigments (like rhodopsin in rods) that undergo a structural change when exposed to light. **Hint**: Think about how light affects the photopigments in these cells. 5. **Conclusion**: - The cells that generate the first potential on stimulation by light are the photoreceptor cells (rods and cones). **Final Answer**: Photoreceptor cells (rods and cones). ### Summary: In summary, the cells responsible for generating the first electrical potential in response to light during the mechanism of vision are the photoreceptor cells, which include rods and cones. These cells are crucial for converting light stimuli into electrical signals that can be processed by the brain.
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