The key difference between ciliated and microvillus borders lies in their structure and function: cilia are motile structures used for movement, while microvilli are non-motile structures that increase surface area for absorption.
Here's a detailed comparison:
Ciliated Border vs. Microvillus Border
| Feature | Ciliated Border | Microvillus Border |
|---|---|---|
| Structure | Hair-like projections that contain microtubules. | Finger-like projections of the cell membrane. |
| Motility | Motile; capable of rhythmic movement. | Non-motile. |
| Primary Function | Movement of fluids, cells, or particles along a surface. | Increase surface area for absorption. |
| Mechanism | Cilia beat in a coordinated manner. | Relies on diffusion and transport mechanisms. |
| Reference Information | Cilia follow a rhythmic movement or movement of cells over the object | Microvilli just enhance the absorption of nutrients by increasing its surface area |
Detailed Explanation
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Cilia: These are larger, motile structures that actively move fluids or substances across a cell's surface. For example, the cilia in the respiratory tract move mucus and trapped particles out of the lungs. They contain a core of microtubules arranged in a specific pattern (9+2 arrangement).
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Microvilli: These are smaller, non-motile extensions of the plasma membrane. Their primary function is to increase the surface area of the cell, which facilitates absorption. They are commonly found in cells lining the small intestine where nutrient absorption is crucial. Microvilli don't contain microtubules but are supported by actin filaments.
In simpler terms, imagine cilia as tiny oars that row fluid along, while microvilli are like dense carpet pile, maximizing the area available for absorption.
