Rate of diffusion of gases is not influenced by

Options

A. Pressure gradient
B. Solubility of gases
C. Thickness of olfactory membrane
D. Distance of diffusion

Answer

To determine which factor does not influence the rate of diffusion of gases, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Diffusion**:
- Diffusion is the process by which gas molecules move from an area of higher concentration to an area of lower concentration. The rate of diffusion can be influenced by various factors.

2. **Evaluating the Options**:
- **Pressure Gradient**: The rate of diffusion is influenced by the pressure gradient. A higher pressure difference between two areas will increase the rate at which gases diffuse.
- **Solubility of Gases**: The solubility of gases in a medium also affects diffusion. Gases that are more soluble will diffuse more readily.
- **Thickness of the Membrane**: The thickness of the membrane (in this case, the olfactory membrane) does not significantly affect the rate of diffusion of gases. This is because diffusion occurs across a membrane, and while a thicker membrane may slow diffusion, it does not influence the fundamental process of gas exchange.
- **Distance of Diffusion**: The distance over which diffusion occurs does influence the rate. The greater the distance, the longer it takes for gases to diffuse.

3. **Conclusion**:
- Among the options, the thickness of the olfactory membrane is the only factor that does not influence the rate of diffusion of gases. Therefore, the correct answer is that the rate of diffusion of gases is not influenced by the thickness of the olfactory membrane.

### Final Answer:
The rate of diffusion of gases is not influenced by the thickness of the olfactory membrane.

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