If the main function is diffusion and movement of mucus, then ideal epithelia will be respectively

Options

A. Squamous and ciliated epithelium
B. Cuboidal and columnar epithelium
C. Squamous and brush-bordered epithelium
D. Cuboidal and brush-bordered epithelium

Answer

To answer the question regarding the ideal epithelia for the functions of diffusion and movement of mucus, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Functions**: The question specifies two main functions: diffusion and movement of mucus. We need to identify the type of epithelium that best serves each function.

2. **Identify Epithelial Types**:
- **Diffusion**: For diffusion, we need an epithelium that is thin and allows for easy passage of substances. The ideal type of epithelium for this function is **squamous epithelium**. This type consists of flat cells, which minimizes the distance substances must travel, enhancing the diffusion process.
- **Movement of Mucus**: For the movement of mucus, we require an epithelium that has structures capable of facilitating this movement. The ideal type of epithelium for this function is **ciliated epithelium**. This type of epithelium has hair-like projections called cilia on its surface, which can beat in a coordinated manner to move mucus along the epithelial surface.

3. **Conclusion**: Based on the above analysis, the ideal epithelia for the specified functions are:
- For diffusion: **Squamous epithelium**
- For movement of mucus: **Ciliated epithelium**

### Final Answer:
The ideal epithelia will be respectively **squamous epithelium for diffusion** and **ciliated epithelium for movement of mucus**.

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