Microfilaments are involed in

Options

A. amoebiod movement
B. ciliary movement
C. muscular movement
D. both (a) and (b)

Answer

### Step-by-Step Solution:

1. **Understanding Microfilaments**: Microfilaments are one of the three main components of the cytoskeleton in eukaryotic cells. They are primarily composed of actin and play a crucial role in maintaining the cell's shape, enabling movement, and facilitating cellular processes.

2. **Types of Movement**: The question presents three types of movements: amoeboid movement, ciliary movement, and muscular movement. Each of these movements is associated with different cellular structures and mechanisms.

3. **Amoeboid Movement**: This type of movement is characterized by the formation of pseudopodia, which are temporary projections of the cell. Microfilaments are essential for this process as they allow the cell to extend and retract these projections, enabling the cell to move.

4. **Ciliary Movement**: Ciliary movement is facilitated by cilia, which are hair-like structures on the surface of cells. This type of movement is not associated with microfilaments but rather with the arrangement of microtubules.

5. **Muscular Movement**: Muscular movement is primarily due to the contraction and relaxation of muscle fibers, which involves myofilaments (actin and myosin) but is distinct from the role of microfilaments in amoeboid movement.

6. **Conclusion**: Based on the above information, microfilaments are specifically involved in amoeboid movement, particularly in specialized cells like white blood cells (e.g., macrophages) that utilize pseudopodia for movement.

### Final Answer:
Microfilaments are involved in amoeboid movement.

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