Pigment lodopsin in contained in

Options

A. Rod cells
B. Cone cells
C. Amacrine cells
D. Horizontal cells

Answer

To answer the question "Pigment iodopsin is contained in," we need to analyze the options provided and understand the role of each type of cell mentioned in the context of the eye.

### Step-by-Step Solution:

1. **Understand the Types of Cells**:
- The question provides four types of retinal cells: rod cells, cone cells, amacrine cells, and horizontal cells.

2. **Identify the Function of Each Cell**:
- **Rod Cells**: These cells are responsible for vision in low light conditions (scotopic vision) and contain the pigment rhodopsin, not iodopsin.
- **Cone Cells**: These cells are responsible for color vision and function best in bright light (photopic vision). They contain pigments called photopsins, which include iodopsin.
- **Amacrine Cells**: These are interneurons that play a role in visual processing but do not contain any visual pigments.
- **Horizontal Cells**: These cells also function in visual processing and do not contain visual pigments.

3. **Determine the Correct Answer**:
- Since iodopsin is specifically associated with cone cells, the correct answer is that iodopsin is contained in **cone cells**.

4. **Final Conclusion**:
- Therefore, the answer to the question is **option 2: cone cells**.